We happen to build the perfect solution to avoiding GitHubs Merge Queue - ours :)

It’s also massively more performant

https://trunk.io/merge-queue

while external merge queues offer a ton more features, i wouldn't describe any of them as 'perfect' based on the simple fact the UX is bolted on. github continues to display their native UI components for merging, and users are forced to interact via arcane commands in comments or external CLIs/webpages. not ideal!