Mary Renault's the King Must Die is a novel about Theseus. She tries to turn the story into something that could theoretically have happened, or almost, anyway.
So rather than fighting monsters, as a young man Theseus was a bull dancer, one of a trouple that did crazy stunts in a public arena involving acrobatics and large bovines.
The book is not completely devoid of fantasy though.
3 out of 5