Yes John,
If we look back at his achievements they must rank as equivalent in points/titles and overall successes with any F1 superstar.
I can go back to the late 70's (but you might be able to tell us a bit about what he did before that?
)
He won and was always on the pace with:
The Grp 5 Zakspeed Capri's, (still got a Burago 1:24 scale Liqui Moly one somewhere!) often humbling the more powerful but awkward Kremer Porsches.
The Zakspeed developed C100 which was succesful in Interserie if not WSC and dropped before it really got going!!
Numerous successes with Joest 956/962's including Le Mans/Group C and USA/IMSAGTP
Eggenberger's RS500's in the ETC and DTM
ITC/DTM with Mercedes then Opel
And to round it off as quick as any of the young guns in the bizarre Merc CLK- GTR!
Now that's a driver!!!