I'm gonna just talk about RO4E and Section.80 cause the rest of those albums are a distant second. I can't say you're wrong about Returnof4eva on the basis of being an outstanding album. If we're just talking insight and impact here then Section.80 takes the crown because it was more exploratory than RO4E. On a purely aesthetic level though RO4E is a beast of an album production wise and lyrically and on those terms these albums are 1 and 1a.