I hope The Amazing Jonathan is not like this in real life. 
Have no idea about what the other two are really like. But for as big of a douchebag as he comes across on TV, I’ve heard Hannity is actually a fairly cool guy, at least to his staff anyway.
Andy Dick.
Kathy Griffin (although it looks like it could be a lot of fun to hang out with her).
I don’t believe he is…and I would have reason to dislike him.
A good portion of his act, but not in the clip that was linked, he pulls some unsuspecting chump out of the audience to play the straight guy for his act. Guess who got pulled out one night? Afterwards, he gave me some parting gifts and took a moment to say thanks and generally seemed like a decent guy. Granted he was talking to somebody he just used for his act, but the vibe you got was working guy who took the time to talk to everybody who waited around after his show.
I got the same feeling watching The Amazing Johnathan live. The person he pulls from the audience always seems to be enjoying himself. Johnathan’s comments are so ridiculous and over the top that you know he’s not serious about them.
Carrot Top.
From what I hear, from people who went to NYU with him, he’s nice and approachable. That he wasn’t known for making grand entrances and depatures (besides for sleeping in class from time to time). Basically, he didn’t disrupt the class. He would ride buses and the subway. Not saying he’s not asshole, but if he is he’s not a raging one.
I watched his interview with Craig Ferguson recently, and he gives off a very…strange vibe. Like if he were on a train later in the day, I’d wait for the next one rather than get on with him.
Courtney Love.
Janis Joplin.
If I found out Harlan Ellison is no asshole, not only would I be surprised, but Harlan would be just too embarrassed for words.
My understanding is that Ellison in charming mode, can apparently be fairly charming. You just never know for sure which Ellison you’re going to get ;).
I’ve never met him, but I know several people who worked at WABC radio, and they all thought both Sean Hannity and Alan Colmes were extremely nice guys. Considering that these friends regarded 99% of radio personalities as egomaniacs and jerks, it speaks well of Hannity and Colmes.
I didn’t mention him myself in the OP, but I am surprised no one has mentioned Charlie Sheen in Posts #2 to #32.
I think that would be well past “surprised.” 
I listened to an interview with Andy Dick on WTF with Marc Maron recently (really good podcast BTW). Maron told Dick he wasn’t really evil, just very self absorbed to the pont where he didn’t know or care he was hurting people and Andy Dick agreed.
Case in point. In Vegas Dick was playing in a celebrity poker tournament, and baked on pot. He said he made his assistant carry his pot for him. The cops notice he is baked and after doing a search arrest his assistant since he is the one carrying the pot. Andy Dick then goes upstairs with a female officer (who I believe was just escorting him to his room) and has sex with her while his assistant is sitting in jail because he had Andy Dicks pot.
The cop Andy Dick slept with eventually got his assistant out, but I have no idea if Andy Dick played a role in that or if he even cared that his assistant was in jail for holding his drugs while he was fucking one of the cops who busted him for it.
As for my list:
Marilyn Manson
Patton Oswalt
David Cross
I knew several people who had interactions with John Mellencamp and they all said he was a dick.
Dick doesn’t come off as badly in that story as the cop does. I mean, wasn’t she on duty?
Yeah. But how often do you get to fuck Andy Dick. She saw her advantage and she took it. Thats what heroes do.
From what I’ve heard, often as you like if you live near him, be ye a he or be ye a she.
Are you asserting that ‘dereliction of duty’ + ‘fucking Andy Dick’ is, in any measurable way, worse than ‘fucking Andy Dick?’
Once you pass the big event horizons, the small ones don’t matter anymore.
–
To be fair, anyone would have trouble resisting the bragging rights that came with that story. “Yeah, she was gonna arrest me, had me dead to rights, then I turned on the ol’ Dick charm . . .”
I imagine Anthony Bourdain is a real bastard, but one you’d like to hang out with nevertheless.