Sedna is a bit to tree-huggy fluffy-bunny for me. No fun 
Have to go with Oak I think, you'd get buffed by him every minute or two! 
I'd be a bit nervous worshiping any of the evil guys.. they don't seem like the stable, happy types
Rook would mean well, but I'd worry about him accidentally stepping on his followers while heading to the loo in the middle of the night.
Erebus is batting for the wrong side.