hedonist

US /ˈhi.d.ən.ɪst/
UK /ˈhi.d.ən.ɪst/
1.

hedonist

someone who tries to have as much pleasure as possible, according to the belief that the most important thing in life is to enjoy yourself:

:
The Marquis de Sade was a hedonist who believed there should be no limits on human behavior.