You're really obsessed with FS games aren't you? Can't blame you though, they are the best dev in the market
The ones I finished
1) Elden Ring
2) Dark Souls 3
3) Bloodborne
4) Dark Souls 1
5) Dark Souls 2
All those games a 90+ in a scale of 100
Sekiro is really great and another 80/100, but I never finished it because I suck hard with parrying and this game is hard as fuck. Also the lack of customization and RPG elements to adapt to my playstyle make me less inclined to go back to it and try again
Never played the original Demon Souls, only the Bluepoint version which is another 90/100 for me. Better controls, camera and, of course, graphics compared to DS1 and DS2, but weaker level design and RPG elements. I think I would probably find the original a bit clunky
Bought Armored Core 6 and played for like 6-8 hours. It's a very good game, but I just dislike things with robots. I will come back to it eventually, sounds a solid 80-85 for me
Overall I never played a FS game that is anything short of great. Those guys rocks