Pick a rolling release distribution with a limited number of opinionated choices. Arch is a good one. Void is another (although far less main stream).
Ubuntu is very non-modular and highly opinionated, probably avoid that.
I recommend XFCE over LXDE, it’s probably a better compromise in terms of what you’re looking for.
So, my advice:
- Install endeavourOS (or arch directly if so inclined)
- Choose xfce at install time
- you may install gnome and then xfce over the top of you like
- you may also like KDE plasma, but try to avoid a mix and match with gnome/xfce and KDE, you’ll find some theming etc will be a nuisance
- Keep it up to date.
Yeah gotta back Arch here. It’s relatively stable and a good compromise between the two extremes of non-modular highly configured and DIY.
The only moving part with arch is installing a couple packages.