zksync because of argent, actually... but, let's be real, gotta get those briq boxes on starknet!
zkSync has their prover working (allegedly) on a regular GPU, that's putting them hugely ahead imo
StarkNet's zkSync 2.0. Once EVM compatibility and equivalence are ready to roll out to mainnet I think they are well positioned to be the leader.
Scroll a lot and I was happy to see that Lens will be on Scroll (📜,🌿)