1. itachi -he planned events long after hes dead, an example of that would be naruto using kotoamitsukami on sasuke when they fight, if itachi didnt end up fighting naruto, this plan would have worked. another exaple would be the amaterasu that itachi inplanted in sasukes eye as his last resort to kill tobi. even tobi himself admitted that he would be dead if itachi knew more about him. he single handedly shaped sasukes life, and last but not least he was an anbu captain at 13, the same age everyone else graduates from ninja school. being nominated as a captain requires being quick, intelligent, and good battle strategist for you lead your men properly, not just skill as a ninja which he also possessed. being ranked as a captain is a full adult responsibilty and the fact that itachi got it at age 13 is an unmatchable feat that minato wish he can match.
2. minato - his only feat is being able to figure out how tobis time and space jutsu works by himself. a feat that puts him easily on 2nd, but not enough to shake itachi off #1 spot
3. kakashi/shikaku - theyre both intelligent and good strategist, i cant decide whos #3 between these two.