Final answer:
Odysseus is the epic hero known for getting lost on a seafaring journey that led to the death of his entire crew.
Step-by-step explanation:
The epic hero known for getting lost on a seafaring journey that led to the death of his entire crew is Odysseus. In the epic poem The Odyssey by Homer, Odysseus embarks on a long voyage home after the Trojan War. Due to his arrogance and defiance of the gods, his journey is fraught with obstacles and challenges, resulting in the death of his crew.