kevin spacey - mind games - a tribute to john lennon
i'll say the obvious one: sherilyn fenn in ruby. nice husky voice. ;)
Helena Bonham Carter, Johnny Depp, Amy Adams, Uma Thurman, Isabella Rosselini, Nicholas Cage, Russ Tamblyn... wow there are actually quite a few of them!
That god damn trailer's more popular than Uncle's Day in a whorehouse!
ewan mcgregor
jonathan rhys meyers
I would not say she is my favorite actress by a longshot. But when I read this forum topic, the first person to pop into my brain was Buffy. I thought Gellar did alright in "Once More With Feeling".
The song she sung to Spike in the end of the episode made me feel sorry for her character, sufficiently enough to put aside any cynicism I had about what's left to challenge a show's lead once death itself is overcome. Therefore, I say that qualifies her in my book.
Leonard Nimoy had a righteous death scene, but his 1960s song about Bilbo Baggins disqualifies him, unfortunately. 
"Go to the sound of cutting wood."
Harry Connick Jnr, although I suppose he is Singer/Actor!!
Frank Sinister in the dead subcategory. This puts him on the thread with his rat pack pal Dino.
Ever checked out that Hartman fellow doing Sat N Live as Frank with the split recording sessions on the early nineties " Duets" album ? Geez 
From Here to Eternity
Summerwind
oh i forgot chris isaak and he's acted right in a few films(bit parts) eh? lol
Must agree with Rebs on Ewan McGregor. David Tennant sung very well in Blackpool.
he was in that awesome film moulin rouge?!? then yeah i'll agree with that. :)
How's about Zooey Deschanel (progeny of Caleb & Mary Jo), whose new cd with M. Ward (She & Him) is fabulous. She also writes songs...
Maggie Gyllenhaal
John C. Reilly!!!