[@melonhead] Of my own roster, the ones that are worth mentioning or still in use are:

Metatron: My take on the seraph, utilizing relevant lore and whatnot.

Lucifer: Like above, though my particular Lucy is one set thousands of years in the future. Theological-historical sci-fi I guess is what I'd call it?

Akira: Kinda complicated. Stripped of absolutely all fluff and lore, he is essentially a psionic being controlled by an alien life form taking the form of a giant stone a la Dead Space.

Gun: You already know this one.

Silver: A fancy robutt with cosmic powers. 

Galvanand: A metal elemental, who uses electromagnetic influences. Pretty mild in raw power output.

Tsukasa: A shinigami( though not the bleach variety). Use of the Japanese ofuda, life energy, and can utilize the essence of various materials to create new effects, and curses. Probably the tamest of my recent characters.