Buu Change Beam > Silver Surfer Transmute Buu can do to many, surfer cannot. Buu can also magic stuff from thin air, magics himself a drink in time chamber etc. Piccolo and kaioshin and some others can also create stuff from nothing.
@willyvereb: You bring up some very good points which now make me think than Accelerator has the edge. 1. Earth Gravity affects Juggernaut, Earth Gravity does not affect Accelerator he has to willingly allow it. 2. Danilo018 mentioned that Cyttorak is magic, Accelerator can dispel Magic, I guess this would probably remove the powers given to Juggernaut, by Cyttorak when Juggernaut makes contact with Accelerator. 3. You mention using Juggernauts strength against himself, i believe that could work here, but then again it could not due to the Magic nature of Juggernaut power.
Volume 13 Accelerator stops earth rotation for 5 mins. Volume 20 Accelerator splits Russia in two. Volume 20 Accelerator shows he can disipate magic (Magic cannot harm him). Volume 20 Accelerator shows that teleportation does not work on him. These Volumes are from the Novel, they have yet to happen in the Manga & Anime.
As much as i like Super Perfect Cell, Broly wins here. Although Cell has many techniques which can help him out. Broly can pop out a Solar system buster or a Galaxy buster on Cell, and Cell is finished.