I too can't fault his drumming. I don't recall what I made of his 'singing' back in the day. I was 13 when 'Love Me Do' was released.
If I was pushed I'd say I saw Ringo as just a part of the wide appeal of the Beatles. They were 'cutting edge' one minute and 'Yer Grannie's Favourites' the next. In the early days.. they, like everyone else.. did covers. Outside of that.. Lennon was abrasive and harsh, but not lacking in angst and emotion. McCartney was all melodic, but also rooted in Music Hall. Harrison was increasingly spiritual. It's complex...it's capable of endless analysis ...and it's all part of the mystique...
Someone upthread mentioned 'Things We Said Today'. For me, it is that quality of songwriting.. for what many might even still regard as 'filler'..which marks out the Beatles as all time classics. Good as most of their chart singles were.. you have to look to the albums for the gems. Can anyone name another band which came up with so many original and enduring songs? Can anyone name another band whose album tracks and 'B' sides were so staggeringly good?
I suspect I'm in the minority here in having actually been there..on the ground..when the Beatles 'broke'. Trust me.. they were out there on their own...