Prep-Man
I think Lodestone is the most powerful magnetic user in DC. Same with Geo and gravity...
http://media.comicvine.com/uploads/6/64507/2215781-lodestone_large.jpg
http://media.comicvine.com/uploads/6/64695/1282818-lw_t01_001_large.jpg
vs
http://media.comicvine.com/uploads/10/100776/2225579-magn_large.png
http://media.comicvine.com/uploads/3/35698/829042-thunderbolts028pic1_large.gif
http://media.comicvine.com/uploads/6/64507/2215781-lodestone_large.jpg
http://media.comicvine.com/uploads/6/64695/1282818-lw_t01_001_large.jpg
vs
http://media.comicvine.com/uploads/10/100776/2225579-magn_large.png
http://media.comicvine.com/uploads/3/35698/829042-thunderbolts028pic1_large.gif