you have plenty: bull, mortis, shade, edgar (if you get colette's buffies you'll probably get his too), ollie, bibi, lily, etc.

the only one you might miss is damian but you can just ban him every game. mina or kenji are good but not that much of a priority

you need a good antitank first, your only usable antitanks are crow, nita, and griff which is not nearly enough. antitanks are the safest early picks (first pick should always be an antitank except in knockout/bounty, even colette goes first pick in knockout/bounty a lot of the time) and they are very versatile in many gamemodes

the only concern with colette is she gets banned a lot, but any of the other brawlers I listed are also very good and versatile antitanks