If it helps, I’m now excited to see almost all of these characters (obviously the Lantern is just sort of there as a backup).
And just like you, I figured I’d share some of my current ideas (subject the change, as always).
The Harbinger/Exile/Lantern: A wizard of some distant order. They want to keep their heads down and not draw the Overlord’s ire (or maybe secretly helping them), while our hero decides “screw that, I’m going to do what’s right.” Not horribly original, but it’s what I like.
The Elf: A person from a space colony which fell to the planet due to Overlord shenanigans (maybe they stole the satellite’s power source as one of their Sources of Power). The elves cannot easily survive on the planet, so they outfit their champion with an hi-tech environment suit so that they can fight the Overlord with the rest of the Fellowship.
The Collector: A champion of the small gods who are being crushed by the Overlord without the Overlord really even realizing it.
The Pair: Fezzik and Inigo from the Princess Bride. I’m going to throw my own style at it, but that’s basically what you’re going to get. Definitely the comedic option out of all these.