I think loco.rs, which actually builds on axum is the closest thing right now. Last time I toyed around with it though, I found it to be pretty verbose, particularly because it uses SeaORM

We were already there in Rust infancy. Nobody enjoyed the baggage that came with userspace threads.

Curious, why the non-async requirement?

The most popular rust web frameworks are Async, and I don't enjoy Async code. (Nothing original here; standard coloring/ergonomics concerns)

If you're waiting for non-async, it'll probably never happen. The best that might happen is with the keyword generics proposal that will remove any differences ergonomically between sync and async code.