The actor from REVAK THE REBEL is called Georges Ehling, a former wrestler it seems. I even found a video on Youtube profiling the former actor/wrestler. Thanks to Scott for the excellent info and the two photos above. I've been trying to figure out who he was for some time and it's now resolved. Yeah!
Second, the mysterious actor in THE SON OF SPARTACUS. His name is Ahmed Ramzy. I saw some photos of him on Google but wasn't sure it was him and his name in the film is Braxus while IMDb had him credited as Murdok - A Lybian Chief. So of course there was confusion going on. But for sure it's Ahmed. On a sad note Ahmed passed away last year, in September. A belated RIP. Thanks for the multiple confirmations.