I was just thinking about this. I guess it's sort of a "new money" stereotype. But I mean the ones who actively thought about the fact they were rich. And knew it was awesome. Not saying they never did any good with their money, never improved the world or anything. But they lived like they were rich and acknowledged it was a great lifestyle. Not like golden age Bruce or Ollie to (to a lesser extent, because of age) Mary Bromfield, who were rich, but didn't seem to have the same mentality.
So, who can you think of?
Obviously, Silver Age Sue Dibny. She loved to shop, loved luxury resorts, and so forth.
1986 series Blue Beetle. Cross his palm with the usual outrageous amount of silver if you want him consult.
Silver age Steve Dayton - and he was a jerk, too. But fifth richest man in the world and he wasn't shy about throwing money around.