Answer: oiltycoon

AnswerCrossword Clue
OILTYCOONGetty, for one
OILTYCOONGetty, e.g.
OILTYCOONOne whose success is well-earned?
OILTYCOONEntrepreneur who's well-supplied?
OILTYCOONH.L. Hunt, for one
OILTYCOONRockefeller or Getty
OILTYCOONDavid or Charles Koch