Board Thread:Naruto Discussions/@comment-38071683-20191201083142/@comment-32685487-20191205022154

Before it was revealed Hashirama had a healing ability and Sage Mode, Hiruzen was said to be the strongest Hokage in history in his prime. So I say excluding Naruto it goes Hashirama, Hiruzen, Tobirama, Minato, Tsunade, and then Kakashi.