Stacks/sBTC which may have found a reasonably decentralized way to operate a sidechain (on a DPoS-style setting with a federation with up to 1000 participants
Having a pre-mined token for your "layer 2" is the exact opposite of what a Bitcoin layer 2 should be. The most critical aspect of a layer 2 is to reuse bitcoin, not to invent a new token.
I don't think the world needs another pre-mined token to "solve" scalability. What we need is a solution that compresses multiple bidirectional channels into one UTXO. And if I had to bet which solution does this best, I'd go with
Ark or another covenants-relying solution.