Gonna have to disagree with you there. The reason why I said he was the g.o.a.t. was because he has adapted. He went all the way from 93 to now. 50 Cent's first album, Get Rich Or Die Trying, was almost entirely produced by him with incredible beats. Go listen to the beat on the song "If I Can't" and "Many Men (Wish Death Upon Me)."
What did he do from 1993 to 2000? I want many examples, not just one. Good producers won't produce one album, two albums, or 10 albums in that time. They'll produce lots. What did Dre do? He tried to start and produce The Firm (splitting the album with Trackmasters), but things didn't work out because it sucked.
He also started up Aftermath Records, which didn't have
anything going for it. That's a lot of downtime right there. I actually bought their first album (a compilation of crap), and the only thing I remember is 'Been There Done That', which was rubbish.
It was only in this decade that he produced a couple of songs on Eminem's album (in 1999 or 2000), and I really don't think the production stood out. I certainly didn't notice it. It was just very average....very generic.
Funny thing is that Timbaland and Pharrell were starting to get big in the late 1990s (Timbaland's albums with Magoo, The Neptunes did Superthug), and now nobody even misses Dre, or TrackMasters, RZA, Jermaine Dupri, Master P, DJ Quik, etc. Only P. Diddy survived the last 20 years, which is funny and sad.

Dre is still (physically) still in rap because of NWA, Snoop's 1st album, the trend that was Eminem, and Chronic 2001 (his album). People let him be out of respect more than anything else.
PS: My favourite Neptunes produced track is "Grindin' " by Clipse. Hell, all their best production went to Clipse's 2 albums.