Ive seen this deck pop off and level entire boards by bringing Massacre Wurm back to slay a bunch of tokens, and there are some low-cost creatures to get the ball rolling pretty quickly
Luffy, Sabo, and Portgas D
Kefka, Dancing Mad Decks on EDHREC: 273 While a seven-mana commander is a pretty hard sell nowadays, especially in such not-rampy colors, Kefka is still a great commander option if you love stealing cards from other players
Among all the new catch-up ramp cards in white, Id say that this card is one of the best
The Tyranid Swarm is a +1/+1 counters deck with a token creature subtheme
The one thing I will note: you want to be playing around 27 lands with eight cycling duals, which limits you to Grixis or Esper instead of the traditional Temur or Jeskai