Jack from Will & Grace. A show with Jack in his late teens struggling with his sexual identity and coming out in the last episode would be a great service to all young gays and lesbians. Throw in a rah-rah Christian neighbor (Pray The Gay Away) and the young woman who loves Jack and it’s a hit!
Guerrero from Human Target.
And there was another similar character on a show around the same time that he should have teamed up with, but I can’t remember who or what show. Into the depths of TV Tropes…
Maybe team him up with Elliot from Leverage.
Christine Baskets
What about a show with Abby from NCIS and Garcia from Criminal Minds as college roommates? Sort of like Freaks and Geeks, with them being the computer geeks.
I’d watch a show about the ‘other’ US Marshall, Deputy Tim Gutterson.
I’d support this. Rachel’s an interesting character too.
I think a prequel to Justified may be good.
It worked for Sheriff Lobo.
When The Closer was on, I wanted a spin off with Flynn and Provenza retiring, moving to Florida, and opening a private detective agency together.
But Major Crimes ruined the characters. Alas.
I liked Enos better the the Duke Boys (since I hated them that wasn’t that big a deal, but I thought Enos was a fun show.)
There was an attempt made for a Married…With Children spinoff with David Garrison as Steve Rhoads which would have taken place at Trumaine University, the college that Bud Bundy attended.
And Ella from Lucifer. That definitely seems to be a trope now, geeky forensic person.
Sometimes a little bit goes a long way. Which illustrates why not every supporting character can sustain a show if cast as a main one, and explains why ensemble casts can work so well if no single character dominates.
Given that Boyd was supposed to die at the end of the very first episode, I’d say he did pretty well.
NSFW
Dank and Dabby

Watching an episode of Green Acres on MeTV, I’ll say Arnold Ziffle.
That is one charming motherfucking pig.
The B.P.R.D… Hellboy is great, love him. But a B.P.R.D. show Netflix or Amazon could be great.

And Ella from Lucifer. That definitely seems to be a trope now, geeky forensic person.
And Alec Hardison from Leverage could be a friend of all the computer ladies.
There a lot of possibilities for characters who could have had long running shows of their own. How about Joey from Friends? Or Joanie and Chachi from Happy Days?
Oh, this is a real good one, Mr. and Mrs. Roper from Three’s Company!
Eddie Haskell.

Why did Cleveland Brown get his own show and not Glenn Quagmire?
MacFarlane said something along the lines of “Nobody wants to see a show about a rapist.”