When Richard bought it looked so gruelling. Hans Gruber freefalling was was up there. The bad guy getting flattened by a freight carton in Leathal Weapon 2.
These guys bought it big time. They were memorable not just because they were creative or just gross, but because in some way they were among most cinematic. If these aren't the cinematically best offings of movie villians, what do you think was?
Tony Montana death in Scarface is my most mermorable. it's just so tragic how he rose from the poor to rich and powerful and then lose everything so quickly. great shooting scene too.
Stop saying william dafoe from platoon...his death was way over dramatized. He got shot a crap ton and was still waving his arms around like mary poppins.
The reason why Hans Grubers' death looks so good is that the actor who played him (Alan Rickman) was not expecting the drop, what I mean is, obviously not the exact words but just so you get the idea, they told Rickman they were going to count to 5 then drop him onto the crashmat but they only counted to 3 then let him go
Certainly memorable but there are so many competitors ... let's see:
*Terminator2: The T-1000 gets a grenade into his chest, bursting him open in a bizarre shape, then tips over into the molten metal, then starts transforming into all his previous shapes and ultimately leaving a trace of generic "faceless face" on the molten surface, slowly fainting away ... I think that's the most memorable cinema death of a villain for me!
*Underworld: On the other end of the spectrum there is the death scene of Markus in Underworld which is equally memorable, just in a bad way. Selene cuts his head into two halfs and then it takes 30 seconds or something for him to realize that he's dead and for the face to fall off ...
*HEAT: Neil McCauley dieing while holding hands with his hunter. It's debateable if Neil is a true villain but I don't care, this is one of the best death scenes in cinema (and one of the best movies ever made).
Collateral: Vincent, trying to reload like a machine but failing, realizing he lost and was mortally wounded, just sitting down and asking Max a last question. And then he dies, making his rounds in the subway. It's ironic and tragic since Vincent told Max about the story that one man died in the subway without anybody noticing for days.
Se7en: The death itself isn't spectacular, but it's the fact that John Doe wanted to die this way and that it makes Mills the loser and Doe the winner and yet Mills can't resist to shoot him. This alone makes John Doe and his death bad-ass.
Deathproof: Stuntman Mike getting the snot beaten out of him by a group of sassy chicks. And the the final shot where they crush his skull with a stiletto ...
Your description of the death from Underworld reminded me of Taye Diggs death in Equilibrium. Bale slices through and Diggs turns his head before his face slides off.