if it wasnt for the coup de tat and madara always wanting to go to war then yes there would have been, i mean come on the uchiha is like tied for first in leafs strongest clans. look at past hokages tsunade and danzo,really, poeple dont think itachi would b suitable or shisui. i believe you take away madara and there could have been at least two uchiha hokages, tobirama wasnt all that strong and its possible he could b sustituted for a uchiha hokage and tsunade could have been substitued for fugaku or itachi