World Champs who still always felt like mid-carders

Whether it's due to booking or due to the actual talent involved, sometimes certain champions just fail to catch on. In the worst of cases, these reigns sometimes devalue the titles and are a sign that the championships should be unified or retired. What are some instances of this you can think of? I've got:

Jack Swagger

Dolph Ziggler

Mark Henry

The Miz

Kofi Kingston

Kane (sorry big guy! Kanenite4life)

Jinder Mahal

The Great Khali

Alberto del Rio (no matter how much they pushed him he always got crickets)

JBL (all I remember were his man boobs and wanting to change the channel when he came on)

Any others?

Mind you, this isn't to knock the actual talents listed (Kane, Miz, and Kofi always have been and will be some of my WWE favorites), but just to see and discuss how and why their reigns were either short, never repeated, didn't catch on, or was a sign the belt itself would be retired. I have some ideas but would like to hear yours.