The most memorable no-line, one line, or never seen again person/char. in a movie

[Barkis_is_Willin]

Total Recall - Hooker with 3 boobs. She will appear in the remake, too (different actress).

[Love_Rhombus]

@Earl_Snake-Hips_Tucker

The Banjo Kid in “Deliverance.”

My understanding is that it’s actually 2 people playing that role-one to play the banjo, who was hiding behind the couch, and the kid sitting there, who apparently was “normal” despite his odd features. Still interesting.

[The_Other_Waldo_Pepper]

There’s always Wolverine, in X-MEN: FIRST CLASS.

[Push_You_Down]

@Suil_Dubh

You could argue that the other bounty hunters from “The Empire Strikes Back” (Dengar, IG-88, 4-LOM, Bossk, and Zuckuss) were quite memorable to a generation of kids who had the action figures. Heck, to this day I still remember all their names, and I’m not even that big of a Star Wars fan.

They only appeared for a few seconds, none of them had a line (I think Bossk may have growled), and if I recall correctly they never appeared again in the rest of the film.

Some argue Bossk actually says “Watch your mouth” to the Imperial who just called them all “scum.”

It just sounds like “Grrghwachgrryoggrrmougrsss”

[Raza]

It’s been a while since I’ve seen the movie, and unlike most of the excellent examples already given this character is on-screen a lot, but: Blame it on the Bellboy, where Bronson Pinchot’s character (the bellboy) spends the entire picture practicing the surname of guest(s): ORTON.

[Earl_Snake-Hips_Tucker]

@Love_Rhombus

My understanding is that it’s actually 2 people playing that role-one to play the banjo, who was hiding behind the couch, and the kid sitting there, who apparently was “normal” despite his odd features. Still interesting.

And. . . (unrelated to the OP, though) NOT featuring Ed O’Neill as a deputy, despite the many references to it–one coming from no less a person than Leonard Maltin.

[Loach]

@Labtrash

American Graffiti (she was the girl in the convertible).

The scene. Damn I love that 1956 hard top covertable T-Bird.

[teela_brown]

It’s more than one line, but not much more:

John Turturro as “the Jesus” in The Big Lebowski.

[Tangent]

Here is another very memorable blonde in a convertible.

[Labdad]

Bobby Troup in the movie MAS*H: “God damn Army!”

[xizor]

@Suil_Dubh

They only appeared for a few seconds, none of them had a line (I think Bossk may have growled), and if I recall correctly they never appeared again in the rest of the film.

Nerd find: During the scene in Bespin when Chewbacca is getting the pieces of C3PO back, IG-88 can be seen sitting in a pile of trash.

[CalMeacham]

Easily one of the most interesting characters with no lines in a film is the katana-wielding “ninja” in the 1967 James Bond film You Only Live Twice. You see him go through his kata at the “ninja training school”, which is impressive, but then he goes through it again, in ninja garb, in Blofeld’s SPECTRE lair in the volcano, taking out half a dozen SPECTRE goons. If you watch it in a theater, there’s always an audible audience reaction after the second run-through.

[Loach]

@Tangent

Here is another very memorable blonde in a convertible.

She had a much bigger part later in the movie.

[GrandWino]

Jeff Goldblum in “Annie Hall.”

“I forgot my mantra.”

[Loach]

@Bob Ducca

Jeff Goldblum in “Annie Hall.”

“I forgot my mantra.”

Or his role in Death Wish. (NSFW language)

[Loach]

A slightly larger role than what the OP calls for but the character Wedge in Star Wars is memorable because he had the same tiny role in the next two movies. And then apparently went on to become a major character in the books.

It wasn’t until years later I realized that Denis Lawson was the same actor who appeared as Gordon Urquhart in one of my favorite movies, Local Hero. And he happens to be the uncle of Obiwan Kenobi (Ewan McGregor).

[John_Bredin]

@Nature_s_Call

I’m stretching the word “memorable” here because of how much I don’t remember.

In some movie, probably a rom-com, a man and woman are talking to each other outside in front of I think her apartment building. I think the building was painted blue. From a second floor window a man watches on.

Out of the blue she yells at the window-watcher dude something like, “It’s not all about you!” then resume her original conversation.

I don’t recall if the window-watcher was ever introduce previously nor if he reappeared. That line and its abruptness, though, has stuck with me for some reason.

In the same vein, the guy who yells out his window “Why don’t you kiss her? Ahh, youth is wasted on the wrong people!” at George and Mary in the leaving-the-dance-in-robes scene from It’s a Wonderful Life. George tries to kiss Mary at that point in time pretty much because the old guy just dared him to.

[salinqmind]

• Does Robert Blake’s weird scene in Lost Highway count, or is it too long?

• The cashier in the store, in Paper Moon, that Addie was pulling a scam on with her $10 bill she claimed she got for her birthday from her aunt. The cashier got chewed out by her boss for questioning the tactics of the ‘poor little girl’ who only wanted the proper change! She looked frightened, jobs were hard to come by during the depression as much as they are today…

[MadTheSwine]

@The_Other_Waldo_Pepper

There’s always Wolverine, in X-MEN: FIRST CLASS.

“Go f*ck yourself” Great scene!
Wondering if Kevin Costner counts as the body(Alex) in The Big Chill? Been years since I watched it but I think you get a glimpse of part of him.

“Nice night for a walk.. eh?” Though he has more than one line(3 I think).Bill Paxton in The Terminator

[fiddlesticks]

There are a couple of one scene characters in Fargo, I’ll go with Mr. Mohra.