Skyrim: To be a dragonborn dark knight
Yes, I am playing Skyrim right now, so it's kind of fresh in my mind, but I'd argue, at the very least, that Skyrim's relatively flexible spec system allows you to play something similar to a death knight. For example, right now my Dragonborn is using heavy plate armor and dual ebony swords I have enchanted with frost and fire and renamed Lichborne and Hellmouth. While he mostly beats people (and dragons, giants, and bears) up with the swords, he also has a decent amount of work in conjuration tree, summoning and/or resurrecting undead minions. Once I get to level 100 in that skill, I can even get me a perma-ghoul if I want.