Deadpan Snarker: Very very deadpan. And usually only with people he feels very comfortable with. Interestingly, he seems to internalize alot of his snarking, as can be seen from the flashback sequence in his last night on the summer tree.
Heroic Sacrifice: He hangs himself on the summer tree in order to bring rain and end the drought.
God of Evil: Sort of. He kinda is, but also isn't subject to the exact same rules as the rest of gods in Fionavar.
Satan: "Sathain". Given that his influence is felt throughout all the worlds in the Tapestry, this is a rather secure association to make.
Galadan, the Wolflord
Anti-Villain: Seems to be an attempt to invoke a type II, but his Freudian Excuse is so ridiculously flimsy that it doesn't really work.
Expy: In his Silmarillion days Sauron was known as Thu the Wolflord.
Freudian Excuse: The reason he wants to completely destroy existence is because the woman he loved rejected him.
Woobie, Destroyer of Worlds: Turned rather genocidal towards mortals after one stole his girlfriend - but when said mortal wound up getting her killed, he went crazy and decided that the only way to end his pain was to destroy the universe. The only time in the trilogy he shows genuine emotion is when he finds some of the heroes apparently "desecrating" his shrine to her, and at the very end, when the heroes spare him and he realizes that there is some good in the world - and in himself.
Mad Artist: He isn't even obviously evil (that goes to his brother), but so obsessed with artifice he's willing to side with Rakoth just so he can find an ancient magical artifact. He doesn't even keep it afterwards.
More Than Mind Control: He's such a masterful speaker that he manages to pull the Dwarves to the side of Darkness.
The Gods and Heroes of Legend
Master Swordsman: It's Lancelot, duh, the best knight of Arthur's court. And boy, does he back up his reputation.
Knight in Shining Armor: It's Lancelot, duh. All that he asked for after defeating a huge, many-armed, burning, shapeshifting, regenerating earth elemental was to never speak of this fight again, since he did it after asking a bystander for some minor help.
Action Girl: As much as it can be said about a female spirit-slash-winged unicorn.