By the Gods!

Sergio Fantoni and Rosalba Neri in ESTHER AND THE KING (1960)

The main actors are Richard Egan and Joan Collins but this pair is more interesting. Not that there's anything wrong with Egan and Collins but as it's often the case in many PEPLUM movies, the secondary characters are often more lively or interesting than the lead actors and their roles they have to play. The best example would be QUO VADIS (1951) with Robert Taylor and Deborah Kerr eclipsed by the Leo Genn / Marina Berti pairing.