I think his voice is good for Dolph but only if you don't know Dolph's real voice. Dolph's voice can be so much gentler than Manfred Lehmann's. Here's a sample:
http://www.stimmgerecht.de/schau/lehman.php
There it is! That´s the voice I was talking about!
Who dubs Van Damme in the movies - a little girl?