The Genie couldn't kill, resurrect or make anyone fall in love. Far from omnipotent if you ask me and he could be combated by other magic users (in the sequel if you count it). I think this comes down to Dr. Strange and Dr. Fate.
Can you clarify the OP? Are you saying the strongest incarnation of Ghost Rider vs Hougyoku Aizen? I don't think it matters but even regular Ghost Rider would god stomp Aizen.
I think I'll go with current Ghost Rider vs. Högyoku Aizen for one round, then classic Johnny Cage Ghost Rider vs. regular Aizen for a second round. Admittedly when I posted this over three years ago I knew next to nothing about either character, but I had a feeling Cage could at least hurt Aizen and even be immune to the Shikai, though I wasn't 100% certain.
Over hype, low ball, bash, praise, poor showing, godly showing. Doesn't matter to me. I like the character because the character is interesting to me, and because there is either potential for a good character and story, or because the character has good stories. No amount of fanboy hype for Batman, Spider-Man, or the X-Men will ever make me dislike these heroes or their rogues.