I am a huge fan of Dell, not only for their Linux support, but the quality of their business and consumer laptop lineups has been astounding in my experience. We only order Dell at my workplace and we have very few tickets come in for bad hardware. Their ProSupport techs are third party contractors, but they are very helpful and knowledgable.

I personally own a Dell Inspiron 5570 laptop and I triple-boot Win10/Linux Mint/macOS High Sierra with no major issues. (I did have to swap in a Broadcom WiFi chip to get that working in macOS. I can provide links I used if anyone is interested.)