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Thinkpads and a lot of Dell laptop models both have good hardware and Linux support. I cannot recommend a laptop with a touchscreen, as I have never used nor needed one.

Dell XPS 15 or 17?

I had a Matebook X Pro and it worked really well with Ubuntu but the battery life was terrible in Linux. Maybe it's something that's been fixed or can be tweaked.

Battery life on linux laptops can be indeed improved by tweaking, I did so on various devices. But I never came close to windows battery life and I allmost bricked a brand new laptop while doing so (only save was to tear it apart). So beware of what you are doing.

Thinkpad X1 Carbon, although I'm not sure what the touchscreen support actually looks like (I bought the Windows version of the machine and installed my own Linux distro)