This was already the best comp in the game in Patch 14.1, and then they BUFFED it and nerfed every other comp.
This is an Ezreal/Zed duo carry comp that includes Heartsteel to cap the board high enough to win lobbies. Play this any game you have a Heartsteel opener; it can be a great fallback option for when Yone and Riven are contested.
Crowd Diver has great synergy with Ezreal since it CC's and damages backliners which makes them more susceptible to Ezreal ult.
This comp caps out very high with Jazz and legendaries late game. Easy substitutions once you get to level 9 are Yone -> Qiyana and Sett -> Illaoi. You can also add Jhin if you have Big Shot headliner or if you hit Jhin 2*. You can even fit things like Yorick and Ziggs if you flex the board around a bit.
Heartsteel opener is best for this comp since it transitions so easily into it. You can even play around 5 Heartsteel in the early and mid game for a higher cap. If you don't have Heartsteel (and even with Heartsteel), saving HP is important since it will allow you to take Heartsteel losses late game and get huge cashouts.