I'm still in the late "building out essential squads" phase of roster development, but I'm looking forward to the day when I can slap together a goofy experimental squad just 'cause. And it's no secret that lots of characters are considered "bad" or are simply skipped over because they're not considered worth a hard node farm.
Here's a list of characters that I don't think I've ever seen anybody using in GW, TW, or otherwise, and aren't needed for a TB node or anything like that:
B2 Super Battle Droid
Bistan (4 turn frenzy seems dope but I've never seen him once)
Captain Han Solo
Coruscant Underworld Police (yes, I know he got the TW buff but that was likely temporary)
Ima-Gun Di (which I cannot help reading in my head as "I'ma gonna die")
Imperial Super Commando
Jedi Knight Guardian
Rose Tico (again seems OK, but never seen her, so she makes the cut)
Veteran Han/Chewie (other than unlocking JTR obviously)
Any Jawa or Tusken (I know Dathcha is sometimes used for AAT P1, but otherwise)
Somebody must've found a home for some of these guys, right? Which unloved misfit character is your secret fave?