Goku's universal power scaling exceeds even the king of the Greek gods.
Zeus is the supreme deity of Olympus with reality-altering divine power. But Dragon Ball's power scaling has reached the universal and multiversal tier, exceeding what Greek mythology (even comic-book versions) typically demonstrates.
Zeus's divine magic is a wildcard โ Goku has limited experience fighting magical opponents. But the sheer destructive output Goku can generate likely overwhelms any divine defense.
Ultra Instinct's autonomous dodge would be challenging for Zeus to counter โ his lightning is powerful but directed, and UI dodges directed attacks before they reach conscious awareness.
Universal-scale power, lightspeed-plus movement, Ultra Instinct autonomous dodge. Goku's power has been quantified at levels exceeding most mythological feats.
Zeus's divine magic bypasses conventional defenses. His authority as king of the gods carries reality-warping weight. Divine lightning is a magical attack that ki-based defense may not block.
Goku takes the edge through power scaling. Zeus is a formidable divine opponent, but Dragon Ball's power levels have escalated beyond what traditional mythology can match.
Goku also fights
Zeus also fights