Manchester Terrier should check all of your boxes. Cool dogs. Muscular and spry.
I have a mix that’s mostly Manchester but has white on chest and paws. He’s gotten a bit grey in the muzzle in these pics as he is @ 8. Loves to chase squirrels, kill rats and rabbits and is just as comfortable on the couch lounging with the kids. He does not like to play “ dress-up” even when he’s the sheriff.
When he passes, I will find another.

[Linked Image from live.staticflickr.com]

[Linked Image from live.staticflickr.com]

[Linked Image from live.staticflickr.com]