My name is Wimbledon!

Wimbledon is a sweet, loving boy, who has severe separation anxiety when he has to be away from his people, such as in a crate. He is also highly food motivated, and by that I mean he will take food off of tables and countertops if it is left unguarded. He has never demonstrated any kind of aggression. He is happy to meet new people and is typically generally indifferent to other dogs. He has never been around cats, but has been around children his whole life. He may be intimidating to small children because he is large and gets very excited to be with people.
He does have a heart condition that is well controlled with 25 mg of atenolol: half a tablet twice daily.
I am not in a hurry to rehome him, but I am concerned for his continued long term health and safety given his behavior when left crated and constant food scavanging. He is 5 years old.