Harrison had a completely different arc than John and Paul. He was ascendant when the Beatles broke up and Paul and especially John had kind of already gone pa

Harrison had a completely different arc than John and Paul. He was ascendant when the Beatles broke up and Paul and especially John had kind of already gone past their peak. You can watch "Get Back" and think George was being annoying butting into John and Paul's writing. Or you can notice John is an annoying addict/drunk in almost every scene where work is happening. It was their failure not to realize how much of an asset George had developed into. I find it odd sometimes how penning the lyrics for a song is considered so much more important (artistically & legally) than everything else. There are plenty of songs where the guitar part or piano/keys part is what made the song a success and which would not have been hits just based on the lyrics. Likewise for beats and drums in genres in which the beats/production makes or breaks the song. Even if you could have replaced Harrison with someone as good as Clapton or Beck the Beatles would not have been the same.