I don’t think that’s true. Leo is the best holistic Initiator player but I’d argue other players have shown higher individual peaks on every agent. None of them were as consistent as Leo in a single season though but you could defend that both Trent and Riens are close.
Sova: Brawk/Trent
Fade: Riens/Shao
Skye/Kayo/Breach: Ethan
Gekko: Riens
Tejo: Trent (not relevant but I must glaze).
Honestly I think Ethan should be rated over Leo at this point but flash initiaters have fallen out of the meta so he gets overlooked.
Leo had a monumental year on the most stacked roster at the time and that context is lost on a lot of people; 2023 FNC was a successful SUPERTEAM. It’s much easier to perform when you have insanely consistent teammates to rely on with the most refined system in the world. As an individual talent, I’d honestly rate him next to Riens — slightly weaker mechanically yet smarter.