I'm thinking mostly of vitamins and minerals. I've never thought about it in terms of which ones are more important, so I'm struggling to come up with a sensible answer, but I think it may depend on the individual, and what state they're in.

PS: I recently watched this video https://youtu.be/VaL8EXQE8Uc where the author, an MD, was talking about the importance of salt, which I found a novel and interesting take.