Of the games I have completed:
1. Bloodborne -- 10/10
2. Dark Souls -- 9.5/10
3. Demon's Souls -- 8/10
My preliminary grade so far for Sekiro while I'm early in it is probably around 8.5-9.0/10. Definitely better than Demon's Souls but still a ways behind Dark Souls. Sekiro kind of reminds me of Nioh 1 but without the maddening instant death pits and the super annoying sloth talisman (so quite a bit better than Nioh).