Who do I main?

I’m sure this question pops up a lot around here but i’m new to competitive melee and I guess it’s my turn to pop the question. I usually play ult but for fairly obvious reasons that game can be really frustrating online. My main there is Corrin, and my preferred playstyle probably mirrors her tools as a result. I’m thinking about Shiek, Marth, Puff, and maybe Pikachu. Not a fan of fastfallers, but open to mostly anything else.

Edit: Peach it is! Thanks so much to everyone for your help! <3