The forth was as strong as/if not stronger than the third and he was like twice younger than him.If he lived to his 60s or 70s he would be absolutely unbeatable and the strongest kage of course.Too bad he didn't tho...I think the 3d Hokage was the strongest of all, but we dont know how strong would be the 4th by the age of 40 or 50...
^^I love Bishamon^^ (dare)