The Conqueror...yes, incredibly bad.
However, I give Wayne a break. He was one of those actors who basically stated that he worked to work. He was not a method actor or a prima dona like Brando. He would take any part that paid and he could fit in his schedule. This means he was in some really, really bad films, as well as some outstanding ones.
There are several famous actors who still follow this mantra.....Michael Caine comes to mind.
My question for the forum is what supposedly "great" movies do you think really sucked....
My nomination is "Avatar", seconded by "Titanic". Both Cameron films you note....I don't have anything especially against Cameron, just feel these particular films fell well short of the adulation heaped upon them.
Oh, back to the worst films category, my nomination is "Starship Troopers", for taking a great story, which should have easily translated....and destroying it.