I realize that it is difficult and almost impossible to move players to different positions, but what about...
He has the speed and athleticism to cover him and he won't wiff on the tackle like Gibril. Even if Wake is trailing Gates, he could still leap and knock the ball down. The guy can flat out jump.
SS Vontae Davis 5-11 203 about the same size as Yeremiah Bell and a better cover man (not that bad in coming up to make the tackle either). Also would help covering backs (Sproles) or TE (Gates) or slot receivers (Floyd) if Taylor/Wake rushes from the LB spot.
FS Chris Clemons 6-1 210 He's extremely inexperienced, but could Chris really do any worse than Gibril Wilson? Would his rookie inexperience be any worse than an "improved" Gibril? I'd love to see this kid playing center field and picking off Rivers or at least coming into the screen and helping to knock away a pass to a receiver. Worst case, he could at least catch these free running receivers from behind in the secondary and give the defense an opportunity to hold the other team to a field goal (with the performances that they have been giving in run defense, that's a real possibility).
CB (L/R) Sean Smith 6-3 214 on Vincent Jackson 6-5 230 all over the field. If Vincent Jackson switches sides, so does Smith. If VJ goes to the slot, then Smith becomes the slot nickel. ALL OVER THE FIELD. There is risk associated with doing this, but the consequences are worse to have 5-10 Will Allen's/Nate Jones' facemask getting stuck in VJ's armpit while VJ makes a big 30 yard catch down the field.
ROLB Erik Walden 6-2 245 spying on Darren Sproles all over the field. Walden is a better athlete than Ayodele (even when he was healthy). He's someone who could stay with Sproles in the short area and is a reliable tackler.