Seneca, Aristotle and Diogenes of Sinope. I mostly subscribe to Seneca's teachings, I respect Aristotle as a father figure for science and critical thinking and even if I think Diogenes is a bit hardcore I respect him for that.
I just know the basics about more modern philosophers (also true for minor classical ones) so maybe there is someone out there that is more to my liking, I even remember my philosophy teacher presenting Nietzsche to the classroom as someone I would like and I certainly liked it, but I think that he was so diverse that I must do a deep diving into his works to make a complete picture of his philosophical framework and be able to form a definitive opinion about him.