For my fourth playthrough I picked the Sargon, the Knight. From all the 4 characters he's the easiest to use with a good variety of both weapons and combos, although like all characters he suffers a bit from attacking at empty spaces (but that's the game having a not so good lock-on system). This time I did the bad ending since it was one of the two achievements I was missing and have to say he's a pretty good choice to fight Dal Gurak without the sword of Ianna at full power since his combos don't have insanely slow build ups or long animations. From a design stand-point he might be the best character in the game, but that said my personal rank would be:
Zoe > Naglfar > Sargon > Tukaram.