>>8998825OK, so...
Skeletor loyalists: Stinkor, Two-Bad, 200X Evil-Lyn (Season 1 only)
The Injustice League:
Mer-Man, the evil Aquaman
Beast Man, evil fantasy Tarzan
Evil-Lyn, spellcaster
Filmation Trap Jaw/200X Tri-Klops: mad scientist. Other takes on Trap Jaw also had him as an independent criminal.
Webstor: thief who'd be in prison if he wasn't the Master of Escape
Kobra Khan: ?
Whiplash: devil martial artist and dabbler in magic who wants to be the toughest there is. Would try to save them when something goes wrong for the League.
Clawful: pirate - needs a crew to work (pic related?), would backstab commander
Spikor: enchanted smith
Mercenaries: vintage Tri-Klops, Tuvar & Badra (ironically), Ninjor (ninja literally being sneaky hired killers), Saurod, Blade
Skeletor's robots: Faker, Blast-Attak, Twistoid & Hover Robots
Jitsu is an antagonist who can act independently, but he doesn't seem evil enough to even get summoned to League meetings, And then there's Scareglow.