Gill - Street Figher III 3rd Strike (no real "video") but he is a dick and has very pretty moves. Tank - Left For Dead ( not a real boss but on the right settings very very VERY scary) Dark Falls - Phantasy Star Online The Destoryer - Borderlands. Ganon - Zelda Wind Waker.
pretty much what i got at the moment if i can think of anymore i'll send them your way.