If nothing else, Hitmontop does give you a guaranteed spin if you run Foresight. I know Tomahawk ran it in his last stall RMT a while back and I think he had good success with it. On the topic of Hariyama, I have honestly never tried it, but I've definitely thought of using it many times over(I assume ResTalk with Force Palm + Whirlwind). At some point, I will give it a shot.
Dusknoir might have to come off the list actually, but I'd wait to see where this thread goes since it could still be there purely for reference purposes. It is definitely useable, but nearly everything it can do, Rotom-A can do better. Of course, if it's a WiFi situation where Rotom-A isn't allowed(unless you have the AR code), I could see it...but even then, if it was me, I'd be looking at using Spiritomb over Dusknoir. 'Noir's best set is SubPunch IMO, which doesn't really fit on a full stall team; maybe semi-stall.