When he's healthy and playing like he did in the regular season this year, I do think Curry is the best overall player.
That said, in the playoffs, I think LeBron has shown he's still the most dominant player in the league. I think a big part of that is the fact that playing at a high level in the playoffs often means pushing through injuries and handling really intense, athletic defense. Curry has struggled to deal with injuries and tougher defensive opponents in the playoffs, whereas LeBron has found ways to be the best guy on the floor even when his team is outmatched.