Disco Elysium is not a game I recommend trying to optimize in terms of build, but in my last playthrough I think I stumbled onto the most overpowered version of Harry by trying to play him as an insufferable artsy nerd who's also a communist.
I had him internalize Mazovian Socio-economics (gives 4 XP every time you pick a communist dialogue option), Actual Art Degree (gives 10 XP for every successful Conceptualization passive), and Wompty-Dompty-Dom Centre (gives 10 XP for every successful Encyclopedia passive) and I was drowning in skill points. I could barely go an entire conversation without leveling up. I got so many skill points so often that by the time I got to the mercenary tribunal literally every single skill check in that entire sequence was a ninetyseven-percenter.
Harry Du Bois with Thinker archetype + Mazovian Socio-Economics + Actual Art Degree + Wompty-Dompty-Dom Centre at 1% power













