dominant
absolute
ascendant
at the head
authoritarian
authoritative
authorized
autocratic
boss
chief
clothed with authority
commanding
competent
consequential
considerable
controlling
directing
directive
directorial
directory
duly constituted
eminent
empowered
ex officio
general
great
guiding
head
hegemonic
hegemonistic
imperative
important
in ascendancy
in charge
in chief
in the ascendant
influential
leading
managerial
managing
master
mighty
momentous
monocratic
official
paramount
potent
powerful
predominant
self-governing