Depends on what creativity means to you.
For me the most creative would be the one who has been able to constantly reinvent his sound, blend genres, make music in multiple genres and execute it perfectly.
For some others, they'll choose the guy who builds entire albums around narratives, characters, and themes and is able to turn his albums into experiences.
And others would choose the guy who has the ability to turn everyday concepts into something more complex and finds fresh ways to communicate everyday struggles, ambitions and emotions that resonate deeply with the listeners.
You should have things you don't do, places you don't go to, substances you don't take, words you don't say
By all means, have Principles and Standards.
This sentence by Van Gogh hits hard:
“If I am worth anything later, I am worth something now. For wheat is wheat, even if people think it is a grass in the beginning.”