My dad died at home around 5:30pm on the night before his birthday. My mom asked if it was ok if he wasn't picked up until after midnight so it would be his birthday when she last saw him. That's what happened and I don't recall any bad smells even though he was dead for seven hours before he was removed from home. JMO.
Sorry about your father. I had a similar experience with my Mom. The difference with Cooper though is that he died in a hot car and was in that hot car for hours afterward.