Get any laptop and clean the shit out of it, mod the BIOS if you want to. I'm still on Elitebooks (8770w), they're tanks, and Intel hasn't made noticeable improvement in CPU performance since Ivy Bridge.

Zbooks seem to continue the tradition. Dell's Precisions are great, too.

Haven't had experience with the newer Thinkpads, the design, materials and being owned by a Chinese megacorp kind of drove me away.