Enzo, for once, you're batshit crazy if you think Ziggler's even 1/10th of what Shelton's wrestling talent is. Although they're about the same on the mic.
And i've been through this a million times, but Shelton was the most over face on Raw during '04 and a reliable pop in '05 and could easily have been champion, then they buried him with a "losing streak" and the fans couldn't get into him again until early '09, when he was getting over again as a heel, then buried again in his JoMo feud. He's not even really that bad on the mic, and as far as "uncharismatic", he was super jaded during his last 3 years in the company and it showed. Hell, his last 8 months of ROH work DESTROYS anything Ziggler (or most of the other young talent in WWE) could ever dream of doing, and i'm barely a fan of ROH.
As far as great matches go, Shelton's never been in a position to have a Cena/HBK style "epic", but in every match he tried, he made better due to being a great wrestler.