Nothing he did on his own was as good as The Police.
Good is all relative. It's a spectrum. No matter how good you are, you can only have one best song ever, too. If that's what you compare everything someone produces to ... mega hits... yeah, none of it is as good, but what are you comparing it to. I look at longevity. If you can be relevant for 2-3 decades in music, especially if you have changed bands, props to you.
Today with smart phones and a million channels and movies on tv, it's only gonna get harder for artists to stay relevant.