You are correct @rpeluso, Manuel’s first name is Richard. Levon said he considered Richard The Band’s lead singer; he was Clapton’s favorite white male singer. Richard, Levon, and Rick all sang the melody on different songs, sometimes one of them singing some verses, another others (Rick takes the lead on the "Wait a minute Chester" verse in "The Weight", Levon on all the others). And in some Band songs the three of them sing the verses in harmonies that wrap around those of each other. Robbie has said they were emulating The Staples, who end The Last Waltz performing "The Weight" on a sound stage, filmed after the LW concert. In that version, Rick again sings the "Chester" verse, Richard plays not piano but drums (he was a fantastic drummer, playing them on about half the songs on the brown album), and Levon plays mandolin (all the Band members were multi-instrumentalists), not singing at all.
All three of them could have been a band’s lead singer, very rare in all of Rock ’n’ Roll’s history. All three had (all are deceased now, alas) unique, easily identifiable voices. The Beatles had two great lead singers (George, bless his heart, was not much of a singer), but most bands are lucky to have one. Buffalo Springfield had three singers---as did Moby Grape, making good harmony vocals possible. An obvious 3-lead singer band is Crosby, Stills, & Nash (4-lead singers if you consider Neil Young a singer ;-) . And lastly, Rockpile---Dave Edmunds, Nick Lowe, and Billy Bremner, who, like CSN&Y, had two lead guitarists. They made only one album under that name, but are the band on a number of Dave Edmunds and Nick Lowe solo albums.