I'll go for Stephen Curry, he is the Warriors clutch player who delivers the goods when they need it badly, he has proven that so many times in the past and this year is no different, he keeps getting better every year and as long as they have the same starting five, they will always win the finals.
As we all knew it Steph Curry has been doing such good performances with his previous legacy in basket, so there's no wonder he'll become the potential NBA finals mvp. Hopefully he can do it by success during the finals game, although the court was so hard to beat due to more player around him whose capable to achieve that title. However, as long as he maintained that stable and strong playing skills it's not impossible to happen as long as their team render the best team up, which shows up synchronized team play.