I'm actually between Aoshi and Shougo.
Aoshi was cool just as Kakero described. Also, it was very nice when he started dual-wielding swords.
Shougo, on the other hand, was this badass unbeatable christian dude who was even more powerful than Kenshin(aside from one *cough* error).

Unfortunately, I've never had the pleasure of reading the manga, but rather I watched the series, so I don't know if he is in the manga or not.
here's some info on him(Could spoil slightly)
To make things slightly more even, and since he might be a character who wasn't originally in the manga at all, I decided to vote for Shougo.
[ 01-03-2005, 05:05 AM: Message edited by: uss ]