Trying to remember the name of a ex pro and IBA champion boxer!

I can't remember his name but he was foreign I think and ended up basing himself in the UK. He had a fairly average pro career losing nearly as many fights as what he won. After he retired he was the heavyweight champion or super heavyweight champion for the IBA for a long time but I think he's retired now. Does anyone know who I'm going on about? I think as a pro he fought at light heavyweight or cruiserweight.