Bentley was a constant thorn in Manchester City's side and with new signings Obafemi Martins and CurtisDavies to come in, Birmingham should have enough to stay up.
Fuller almost doubled Stoke's lead on the stroke of half-time when he got the better of CurtisDavies to meet another Delap howitzer throw and nodded just wide.
He has made just two brief first-team appearances for Villa in last month's two-legged Europa League clash with Rapid Vienna, each time coming on as a late substitute for CurtisDavies.
Stoke were twice forced to scramble the ball clear from Luke Young crosses but Tony Pulis' men did occasionally venture forward and Mamady Sidibe went close with a deflected drive after CurtisDavies had failed to clear.