I'd have to echo James on this one.
Tigers were more akin to building a locomotive than a tank, so the numbers were low and repurposing rare. Beside the Sturm and Jagd, I don't think I've come across anything. If you think about, it would also be a complete waste. Tigers were extremely hard to deal with in terms of logistics, and the main goal of that hardship was to get an 88 surrounded by some seriously thick armor. Downgrading the turret wouldn't help anyone.
IVs and Panther hulls on the other hand have countless roles, both factory and field, Flak platforms, Schleppers, Berges, fixed positions, Ersatz M-10s, etc.