I cant choose whom should i main

Hello, im ex-dps doom main, my fav character, never felt same thrill playing any character from any other game, and now, when i came back to OW i dont know what to choose. Any advice?

Tank doom is not my cup of tea, for now a main tanks in general, i can play any other tank, but doom.

With giveaway of free prismatic skin im looking at reaper, thinking of maining him, but he might be too shalow to my liking, same issue with moira, i play her as a flanker, but there is not enough skill expression, to low of a skill ceiling