All Special Abilities?

[SovietNoot]

So I haven't played this game for about 5 years, and forgot some stuff about it. What characters are pretty much essential to complete free play 100%. I know you need a character with the dark side and a bounty hunter. What other character types are needed?

[SlackerBoe]

Ones I can think of: Both types of droids (for c3po/r2d2 switches), A shooter, a dark side jedi, a bounty hunter, a high jumper, a stormtrooper, a small character for trap doors. Mini-kit levels also have imperial ship area's or at least in the prequel levels they do.