Ridley_Prime
If you thought the Cyberdemon was the biggest Doom baddie, you haven't seen anything yet. The Maledict is much faster and far more cunning than Cybey ever was (has a lot more health too). Unsurprisingly, he also has the ability to send Lost Souls and other annoying enemies after you when facing him.
http://img211.imageshack.us/img211/5787/doom3resurrectionofevilgs1.jpg
http://img257.imageshack.us/img257/7280/maledictwy9.png
http://doom.wikia.com/wiki/Maledict
The final fight. His ending's a little anticlimactic, but eh... still an epic boss. More or less intense than the Cyberdemon fight.
V4Or05n4XWc
http://img211.imageshack.us/img211/5787/doom3resurrectionofevilgs1.jpg
http://img257.imageshack.us/img257/7280/maledictwy9.png
http://doom.wikia.com/wiki/Maledict
The final fight. His ending's a little anticlimactic, but eh... still an epic boss. More or less intense than the Cyberdemon fight.
V4Or05n4XWc