Given that I don't even think Misawa is the best of the Pillars and I have Bryan as my #1 ever, I think Bryan takes this one pretty easily. I don't think Misawa ever really developed particularly interesting mat work throughout his career, especially in the much lauded King's Road classics. I find myself far more inclined to watch the opening act of any random Danielson match than I am to watch the opening act of a Misawa match.
For tag team work, it's true that Danielson was never placed into too many positions to make that shine for him with a lengthy run. But if you look at his individual performances in things like the feud vs. The Shield in 2013, you see some real excellent understanding of the fundamentals of American tag wrestling. Through much of his most notable TV run in the WWE, he demonstrated the ability to not only play face in peril but had one of the best, most compelling hot tags anywhere in the world at the time. He might just have the best hot tag from any performer not primarily known for their tag team work.
A lot of people have brought up Danielson's versatility and I think that's a huge factor here. Could I see Danielson making elongated championship-style matches work? Absolutely. Could I see Misawa having a real competitive brawl with the Necro Butcher? I don't know, probably not. I could say Kawada might, I could even see it for Akiyama, but Misawa never really demonstrated that ability to me for various reasons that aren't always in his control.