one obvious option with two pretty nice parks is FELLHORN/OBERSTDORF
another mountain for park skiing in the region, which is pretty much mine and my friends favouite, is GRASGEHREN/ OBERMAISELSTEIN. they always have tons of creative features and is especially great when you are into rails and jibs. the park is not too large though
other options for park skiing would be nesselwang or steibis wouldnt really recommend them though
if youre looking for skiing outside the park ZUGSPITZE would probably be the best. unfortunately they got rid of their park though