I would think right now Fury is top of the current crop of heavyweight boxers. Joshua, Wilder, Ruiz and maybe a couple more are in the same bracket. Then lower than that would be the next group.
Right, he is a shoulder above the rest of the current heavyweight right now. Before it was Joshua and Wilder and obviously, they have lost that 0 already and Fury come back and reclaim the belt he won from Wladimir Klitschko. But what happened to him after that big win was history (mental breakdown, alcoholism etc).
So he was really on top already prior to the breakdown and those belts that both Joshua and Wilder has was his in the first place since and he was strip and then vacated the rest of the title.