I would agree with you, Thor was the better warrior and he was to a degree dominating like Ali, in Ali vs Foreman. However like Foreman when the Hulk got a hold of Thor it was crushing like Foreman punches.
Hulk's strength has shown to by dynamic in the MCU. The Hulkbuster/Hulk fight in AoU showed it and there were some moments in this movie. Unless, there was a stand alone film, there isn't much opportunity for that to be explored.
Unfortunately for Foreman, he didnt have a Thunderclap nor a shockwave in his repertoire. The World War Hulk was able to knock out the Red Hulk with a simple Thunderclap.