egomaniacal
The crew were finding it difficult to deal with the egomaniacally ambitious director.
She egomaniacally pushed her way to the top of the company.
The president seems to be egomaniacally obsessed with how others perceive him.
She seemed to be egomaniacally unable to think of anyone but herself.
He egomaniacally regarded his children as just smaller versions of himself.

SMART Vocabulary: related words and phrases

Showing arrogance and conceit
(as) proud as Luciferidiom
airs and gracesidiom
arrogant
arrogantly
as if you owned the placeidiom
egoistic
egoistically
egomaniacal
egotistic
egotistically
patronizingly
pomposity
pompous
pompously
popinjay
swollen head
swollen-headed
talk down to someone
think the (whole) world revolves around youidiom
throw your weight aroundidiom

You can also find related words, phrases, and synonyms in the topics:

Selfishness