I installed R4.1 on the ThinkPad P51 and it certainly qualifies for inclusion on the community recommended list. Everything works out of the box, including suspend and no workarounds or troubleshooting is needed.
@fsflover, I have proposed changes to the criteria I think you will agree with.
This proves also the point that a machine that started out to be troublesome (installing R3.2 required lots of troubleshooting and workarounds) eventually became a “everything works” case with time.
Here is the HCL report.
I will now install R4.0.4 and check whether suspend works out of the box with that version too.