Totally agree, the peak with his own bands was in the 90s, including the NHB gigs.
But for me, his best work as a guitarist only is in the late 80s, the tour with Clapton. Maybe it's because he didn't have to sing and was able to focus just on the guitar. They were all top-rate musicians on that stage, one top-class guitarist (Eric), and then there was this alien robot playing the "second" guitar - it's like something from a different galaxy! And most of the time you get the impression that he's playing with the brakes on, so that poor old Eric can keep up with him!
In my opinion, MK's late 80's playing were the worst.
That 88/89 tour with Clapton, i felt that MK was smashed by Eric.
Well, its not a competition. Really.
Mark's tone dureing these years were the worse ever, same as his playing.
Clapton was on fire, giant tone, great playing.
Mark had his kind of brilliance playing on Can't Find My Way Home, Holy Mother and more one or two countrish style songs.
People often talk how great MK was soloing on Badge.
I think just the opposite.