Hi all, I'm just looking for legal emulators to start submitting runs. Any help would be awesome. Thank you in advance.

Legality depends entirely on the games and platforms you want to run. There are certain ones that are usually banned (ie. zsnes), but you’ll need to check the rules of the game(s) you want to run - or contact the mods if the rules don’t give explicit emulators/versions - to find out what your options are.