See the only other actors I can think of are:
Nathan Fillion: Caleb on Buffy (evil) and he was Malcolm on Firefly and Mal wasn't necessarily "evil". He was just a theif.
Gina Torres: Jasmine on Angel (evil) and Zoey on Firefly
Adam Baldwin: Some lawyer dude in S5 of Angel (he was boinking Harmony
) and then Jayne in Firefly
And then the person you listed.
Imdb.com here I come.