I am not aware of any German 4 engined bombers operating regularly over Britain.
There were a few JU 86P twin engine aircraft used for high altitude...
STEPHENSON, Anthony Derek George, S/L (41535) - No.100 Squadron - Distinguished Flying Cross - awarded as per London Gazette dated 6 November 1945. ...
SAY, Leonard Robert, Flight Sergeant (1154059) - No.61 Squadron - Distinguished Flying Medal - awarded as per London Gazette dated 22 September 1942....