He was never offered the Liverpool job he was interviewed. However that interview proves he is held in much higher asteam than your preferable choice of those mentioned - Chris Houghton.
Him staying at Wigan proves loyalty more than anything, the fact that he turned down Aston Villa also proved hes not stupid. Look at the turmoil there now.
Say he's loyal and I'll agree entirely. But don't tell me he's ambitious. When he's turned down any club where there's the slightest bit of expectation.