You need to set a budget if you want a good recommendation. Because if you can afford a Svalboard, that is absolutely the peak keyboard experience.

A tier lower than that would be the Bastard Keyboards Charybdis. Here is literally mine.

https://quokk.au/c/ergomechkeyboards/p/676194/blacked-out-charybdis

The Bastard Keyboards Scylla is even cheaper, if you don't want the integrated trackball of the Charybdis.

Regardless, check out the community for more ergonomic keyboard suggestions: !ergomechkeyboards@lemmy.world

If you don't need something that's ergonomic, Keychron is the go-to for cheap-yet-quality mechanical keyboards.