I have to go with the Dragon only because I restored one a long time ago, actually it was the first pin I owned. I think Genie had a great layout. The best thing about this era was the artwork, bright colours and voluptuous women, to attract the young male players
Yes - the artwork on Genie is exceptional. Same with Roller disco.
The mini playfield on Genie was also a great feature. It was also employed on Timeline.