Yes, jjs, John was more into rock than any other Beatle. That`s why i love him so much! He was less pop than Macca and he was more original. All Paul`s solo albums were and are pop, and they lull me into falling asleep. Or getting bored. (Not always, sometimes certainly.) When with the Beatles they both contributed to the diversity of the albums and gained by doing so. It was rock-pop-rock-pop - Beautiful!
Well, John's post Beatles stuff has the same effect on me... for my tastes, there's too little musical diversity, in contrast to Paul who I find to have too much musical diversity. I don't know If I'd call Paul's albums 'pop' though, any more than I'd call John's 'rock'. Whatever Gets You Through The Night is a pop song, Imagine is soft rock, etc. Ram had an artsy MMT sound, Londowntown had a folk sound, Back To The Egg had a hard rock sound, and so on.
But my point here is, John was far less "adventuresome" with his mainstream music, and probably wouldn't have arranged Strawberry Fields like it was, or added the orchestral climax to A Day In The Life if it were solely up to him, because his tendency (by his own words and his actions) is toward a simpler, more standard "rock" song structure. I'm not saying that's good or bad, mind you.