Seer Q'Anilia
Exiled Master Jedi
While for instance the character Jane can finish just about anyone of in a single post (Powerwise), another example would be Mikael who is pretty much so impossible to defeat in one post.
The situation matter, but so does the powers of a character. Yuna for instance has precognition, future sight, teleport and echolocation. Even though she never fights, she would be pretty tough to actually bring down due to her ability to "evade" the combat situation.
Then we have characters such as Billy, Lance and Skiv, who use magic (Which is a VERY wide area of usage). They should always have a say in fights, for as long as it is not Jane they are fighting.