With 100+ km of ITT and not too many climbs that aren't suited to a "diesel" climber, he'd have a shot against all the ones you listed.
Menchov would probably be the biggest problem of the remaining guys sans-Contador on a ITT-heavy GC course. Last year (when I don't think Wiggins form was that great) he was 20 seconds ahead of Menchov, 2:20 ahead of Sanchez, 2:40 ahead of Schleck, 3:40 ahead of VDB2 and 5 minutes ahead of Gesink in a 50km ITT.
If you give Wiggins 10 minutes on Gesink, 5:20 on Schleck, 7:20 on VDB2 and 4:40 on Sanchez before the climbing... then I think he'd have a shot on many courses.
Menchov might be an issue though. 40 seconds probably wouldn't be enough for an in-form Menchov.