I vote for Blackwell as well.
Super course, very quiet. A really classy place -
http://www.blackwellgolfclub.com/ - I believe they appointed a new Head Greenkeeper a few months ago, ex-South Staffs GC, and if he gets the course condition at Blackwell as good as at South Staffs then Blackwell will certainly be worth travelling to play. Shame Blackwell don't hold any club open competitions although there is a pretty good winter green-fee deal on there until the end of March.
Actually, South Staffs itself, which is close to Wolverhampton, would also be a nominee of mine for a quality non-heathland course as would be Olton GC, which is in south-east Birmingham suburbia.
Also on heavy land in the South Midlands and worth a game if your passing is Ross-on-Wye GC -
http://www.therossonwyegolfclub.co.uk/ - it's not the course you can see from the M50 motorway though, that's South Herefordshire. Ross-on-Wye GC is a couple of miles further east.
All the best.