ELO is great and vastly underrated. Nevertheless, if you can't get into the sound at all, no playlist is going to alter that. You could got to Amazon, check the track listing for a best of ELO compilation and replicate that. Alternately, listen to some of their best (and therein most representative) albums from beginning to end: -Eldorado-, -Face the Music-, -New World Record-, and -Out of the Blue-. Early ELO is much more overtly prog rock of the characteristically English post-hippy 'Wizard-y' stripe. Later ELO alternates between ultra-disco bubble-gum pop and cod-prog: - Time- would be the later album to check.
I think Jeff Lynn ought to be credited as one of the greatest Pop composers of the seventies and eighties. He took something of the creativity and infectiousness of The Beatles and made it smoother, more electronic, hookier and gripping -- superlative uber-pop. But it's pop. If you're a hardened rocker, there's nothing that's going to make you put your Stooges cds away.