Korgan
Arbiter
I've been playing some Close Combat: The Longest Dat, and it's a lot of fun, but lacks good AI (too reckless once the fighting's on, but doesn't concentrate forces right) and variety. So recommend something that's not JA, X-Com or Infestation, has some RPG elements and challenging opposition.
EDIT: I decided to leave it as "The Longest Dat"
EDIT: I decided to leave it as "The Longest Dat"