The Tiny/Mini/Micro series from Lenovo/HP/Dell don't use mobile CPUs at all, but the throttled (T) versions of their desktop counterparts. They're even socketed, so you could swap them out.

I use a Dell OptiPlex 7000 Micro having an i5-12500T CPU as my main dev machine and it's very snappy. Add a monitor and mount it on a MFS18 stand and you have a nice all-in-one system.