Dragon’s dogma has a ton of 4. Yes the start is a bit fixed but after getting to the major city you can (and most likely will) forget about the main quest for several hours and just explore and do side quests. There is like, only one dungeon truly gated by story progress and you can skip it and go to the isle if you want.

A ton of 6 too in form of random encounters while travelling around, not much finding NPCs to be fair.