It's really highly debated, some people say Apollo because they put so much trust in Delphi, others have totally different answers
Amon/Amun was patron god of Thebes.
Amun was the local patron deity of Thebes and became nationally important after the Hyksos rulers were expelled from Egypt and Thebes became the capital city. See the related links for more information.
Dionysus was the patron god of the ancient Greek city of Thebes. He was associated with wine, fertility, and theatre, and his worship included various festivals and rituals that celebrated these aspects of life. Thebes, as the birthplace of Dionysus, held significant importance in his mythology and cult practices.
Dionysus was born in Thebes.
He was the god of the city of Thebes.
He was the god of the city of Thebes.
Ares
Zeus was the patron God of Olympia.
Amun, who later would be known as Amun-Ra, was the God who presided over Thebes. The Egyptian name for Thebes was named after him, and means "City of Amun."
Amon-Re was considered to be the patron saint of the city of Thebes. He was believed to have joined with the sun god Re and the two became known as the Egypt god Amon-Re. Amon was thought to be at least partially responsible for creation and protection of the weak.
Amon-Rashkan
The answer to that question is Thebes.