@thibaultamartin I know my tastes are different from most people (e.g. I generally prefer larger laptops), but I'm pretty happy with the System76 Pangolin that I use, and if I had to buy a new laptop, I'd probably get a newer version of the Pangolin. There was a time when I was ThinkPad-only, but nowadays, I personally don't see any reason not to give money to a company that explicitly supports Linux. I chose System76 because they're in North America, so they're more local to me, but if I was in Europe, I might look at something else. There seems to be more options in Europe.
I've never had good luck with battery life, though, with any of the laptops I had. I'm usually happy if I end up with about half the advertised battery life.

@thibaultamartin

I might lose here on GOOD battery life, but a use Lenovo Legion AMD has been very good to me. Mine runs a couple of hours at 4 years old, more than enough for me. This replaced an earlier, newer budget Lenovo that had excellent battery life and light weight. Gamer laptops are heavier, hotter, shorter battery life but much faster, incredible screens, and oodles of cool features.

Otherwise, any AMD has been a good start. Intel adds nothing but cost.

@thibaultamartin The, ahem, canonical answer for this is "Refurbished Thinkpad plus replacement new battery."

close-to-current-gen Thinkpads tend to be very well supported, and replaceable batteries mean they'll be long-lived.

@thibaultamartin I'd buy a Tuxedo laptop, based on my experience with one as my $work laptop for the past month or so.

Quite excellent Linux support (comes with Linux preinstalled!), not perfect, but very close as far as I'm concerned. Battery life feels good, I had ~40-50% remaining battery after 4-5 hours of normal use. It shipped from within the EU too (and shipped fast), which was nice.

My chief complaint is that when I use ddclient to switch my external monitor between laptop & desktop, sometimes the laptop's internal screen stops responding. A suspend & resume fixes that, though. I suspect this to be specific to the laptop - my desktop (running the same OS, same desktop, same versions of pretty much everything) doesn't have this problem.

Can't comment much about its trackpad and keyboard (this seems to be an important property for people), because I don't use either. The keyboard felt okay-ish when I typed on it briefly.

@thibaultamartin ThinkPad T14 with AMD CPU. One of the few laptops that I know with HSI level 4 :)