If I had to guess, I'd say German shepherd/boxer mix. Every boxer mix I've seen manages to have that white chest and a tan color coming out. Though that tan can also come from shepherds. His ears also make me think boxer mix. Only way to know for sure is to look online for a DNA testing kit.
Yesss. After noticing his size next to the furniture, yes. Can't believe I missed his mass!Boxer or great dane probably