Konoha:
Hokage is DA BOSS. Sarutobi(and Tsunade, though most likely for different reasons) had two ADVISORS helping him, most likely with no real OFFICIAL power. He also had the Anbu Head(before he incorporated that position because of Danzo's shenaningans) and the Jonin Commander for that.
Basically, the Hokage had under himself three(then two) different "offices", independent from each other.
Suna looks like has a Senate: older, high ranking ninja, possibly representatives of the various tribes\clan that haven't merged as well in the village as in Konoha.
A single "office" working together under the Kazekage