Been done. David Whatshisname did one about twins who were pretty whacked out.
*And *is hot!
Any movie characters who are veterinarians?
I hate that I know this, but the girlfriend character in the Garfield movie was a vet.
Also, Dr. Doolittle. And I think Corky Romano. And May in the film May is a vet technician or assistant or something to that effect.
Jennifer Love Hewitt’s character in the live-action Garfield, and I think M. Night Shamalan’s character in Signs. Not the protaganist, though.
Accountant: Milo Bloom, The Producers.
Guidance Councilor. I can’t think of one besides the one from Clerks.
That was Leo Bloom in Producers, wasn’t it?
A lot of minor guidance counselor roles in movies, can’t think of any one where the main character was, though.
Depending on how far down the chain one is willing to go, Tom Hanks’ character’s brother’s wife in “Bachelor Party” (played by Wendy Jo Sperber) is a proctologist.
More porn (hard and softcore) than one would want to name, with Dale DaBone playing a masseur in “Sex Spa” as an example. “Happy Endings” featured Bobby Cannavale as a masseur in a primary role but that was an ensemble cast.
Meatballs?
Of course they were CIT’s, counselers in training. Do camp councelers count?
Too slow, of course my reply is to Zoggie 's counseler question
On of the main characters in The Truth About Cats & Dogs – Abby – is a veterinarian with a radio show.
Matt Dillon’s character in Wild Things.
And Tom Hanks’ love interest in Turner & Hooch.
There was an episode of Monk that dealt exactly with one of those clothing inspectors.
Hey, they could find something. A jewel thief on the run throws a diamond necklace down a storm sewer. In older systems there’s a lot of interconnections between the two, although there aren’t supposed to be. It ends up in the treatment plant. They’re arguing about whether to keep it or not, worried about trying to convert a half million dollars in diamonds into cash without attracting attention, the original bad guy is frantically combing the sewers looking for the loot. Throw in a couple of alligators and one of those liver fluke things from The X-Files. It’s gold, pure gold I tell ya.
Men’s clothing salesman. If you do see one, he’s probably a minor character and some kind of shlub.
Brendan Frasier in Monkeybone.
Kevin Spacy’s character in The Shipping News started as a printing press operator, but he quit early on in the film.
Would The Darwin Awards count?
One of the main characters in Adrift in Manhattan is an optometrist, although her job isn’t central to the plot.
I haven’t seen the movie, but in Michael Chrichton’s book, Timeline, the main characters are historians.
I’m not sure I should admit knowing this but, in Look Who’s Talking, Kirstie Alley’s character is an accountant.
Albert Brooks in My First Mister (and it’s a nice little film, too).
Thanks for narrowing that right down.

Cronenberg or Lynch? I’m guessing Cronenberg but IMDB isn’t being very helpful since I don’t know what to plug in.