To be honest, I can't perfectly "feel" the exact meaning of "complacent", since in greek we don't possess a single word to encompass its whole meaning, as I read it in google translate.

Perhaps {maSaHHa'choH 'ej manguqchoH}, would work too, but I don't know for sure..

Complacent doesn't really have an arrogant connotation, except that someone who is complacent when danger is bearing down on him might be complacent because he is arrogant about his abilities. But it's not in the core meaning of the word.

It means you're content with yourself or your situation and not concerned with making changes or progress.

-- 
SuStel
http://trimboli.name