We're not saying he will be, just that he has all the tools to be.
I'm not old enough to completely speculate on this, but I'm pretty sure that Outkast circa 2003(Speakerboxxx/The Love Below) had a bigger year then Tupac/Biggie ever had. And that's coming off the wave from the previous album Stankonia, which had "Ms. Jackson" and "So Fresh So Clean" as hits.
People easily forget what Outkast has done. They won album of the year, no other rapper(minus Lauryn Hill..I guess) can say that. Also, even though it was a double album, Speakerboxxx/The Love Below is the best selling rap album of all time.
They had all the exposure you could ever ask for.
Your only possible knock on Andre, is that he's missing a solo album.
Also don't forget that Tupac and Biggie are elevated because of their deaths. If Andre had died in 2003, we'd have a different story on our hands. Especially if Tupac and Biggie hadn't died in the peak of their popularity.