[Jason Abbadon]

Ronan the Accuser
Quasar
Black Bolt
Professor X
Moondragon
Mantis
Bug
Gamora
Quasar
Daisy Johnson (Quake)
Dum Dum Dugan
Maria Hill
Gorgon (Hydra badass not the Inhumans retard)
Baron Strucker
Scorpio (with the Zodiac Key!)
Mockingbird
Quasar
Tigra
Odin (comic version)
Hela
Ares
Phobos
Maelstrom
The Grandmaster
The Collector
The Black Knight
Sersi
Pete Wisdom
Dreadnoughts
Mandroids
Stringray
Quasar
Jack of Hearts
All the Young Avengers
All the Avengers Academy
All the Runaways
All the Secret Warriors
All the New Warriors (well, okay, there's Firestar)
Spider Girl
Protector
Emma Frost
Rogue
Quasar
Gambit
All the New Mutants
Phantomex
Ka-Zar (and Zabu!)
Shuri (the female Black Panther)
Echo
Misty Knight and Coleen Wing
Paladin
Shroud
Electra
Ultron (Phalanx version)
Annihilius
Blastarr
Liliandra
Quasar
Novacorps Robbie Rider
Firelord
Terrax
Wizard
Medusa
Karnak
Lockjaw
Polaris
Richtor
Quasar
Strong Guy (though the old Toybiz version works great)
Graviton
Count Nefaria
Madame Masque
Firepower
Pyro
Lob
Avalanche
All the Marauders
Classic Sabertooth
All the Exiles (good Age of Apoclypse Sabertooth, Morph, Blink, Mimic, longshot, etc.)
All of Alpha Flight (they already made Guardian)
Jarvis
Jocasta
Quasar
Sleepwalker
Korvac (maybe tranlucent)
Psycho Man
Nova (Herald of Galactus)
Arnim Zola
Ultimo (Big figure!)
Lady Deathstrike
All the Reavers
Nimrod
The Super Adaptoid


And that's just at a glance- there's a LOT of figures still to be had!