Orton's as basic as it gets. He was and is a pretty boring template. Everything I've liked has way less to do with him than those he's working with. You can argue both injury and Evolution stunted him if you go by his style as a worker and a promo from RNN and earlier. Faster, long haired Orton had things going for him much more than RKO Orton did and would've gotten over years faster.
Really I don't think there's many good Orton singles matches. The last man standing with HHH, the Foley match, the first Edge match, Benoit, the Wrestlemanias with Taker and Seth, and there's probably a couple more buried in there but definitely not enough to justify his longevity.