Is there such a player. Scherzer who hit free agency coming off a 5.2 WAR season got an AAV of 30M. Or 28M if you want to take into account deferred salary.
Scherzer projects at 4 wins per year over the seven-year life of the contract if you want to be slightly optimistic. So the Gnats signed him for about 7M/projected win.
I do feel that pitchers and hitters are on a different scale. But Heyward would be that type of player. Stanton is a 6 WAR player and is certainly not being paid 7 million per WAR.