Hmm, ruler of the Forgotton Realms? Now I am tempted lol. But I still hope the 'good character' endings are not as boring as you suggest.
'someone who puts their own personal gain ahead of the wellbeing of other people' ? Sounds like selfishness to me, which in my views is not the same as evil. I'd call that chaotic neutral in terms of alignment. If you were willing to kill for personal gain yeah, that would be more like evil. So not the best definition imo.