No, not what I was thinking of (haven’t seen * Rent *). Mine is from a much earlier movie and a completely different genre.
Hippie person on rooftop in Independence Day?
Nope, again not what I was thinking of. Just watched the scene to get the exact quote and it’s:
“You son of a bitch! Take me! Come into me! Goddamn you, take me! Take me!”
His actual last word is a screamed “No!” as he commits suicide (of a sort) seconds later, but I guess that isn’t so memorable a last word.
#106: “Well, gosh!”
The mayor as a giant snake thingie in Buffy (S.3)
Actually, his last words were “Oh, my.”
#107: “Anything you want!”
Count Rugen from The Princess Bride Link: The Princess Bride (1987) - Quotes - IMDb
You got it 
Of course Inigo’s reply is much more memorable.
Father Karras from The Exorcist, I think.
You got it.