Who do you think are the most murderous, most cruel and the most malevolent villains, ever in the Spider-Man series (whether is Spectacular, ASM or Ultimate, etc.)?
My first pick (not placing him at the top of the list though) would be Mornius since I'm reading MTU #4, the review anyway. He murdered a kid named "Jacob" a few weeks before MTU #4 (Jacob was murdered in #3 of MTU) where he struck again (at two robbers this time) and boy, that scream of that robber just says how terrifying Morbius is.
I would had place Venom in the list but Carnage is a much worst kind of a murderer because, he was already a murderer (his real name is Cassedy though the spelling might be wrong) before the symbiotic got him! Making him a very violent and powerful villain, which is very scary if you think about it. Once, I saw a review about Carnage and it revealed that Carnage has also commited a few murders as well and most of them, if not all, are gruesome.
But what about you guys?