I suspect that "overlooked" was just a less than perfect choice of words by the OP. On this forum, many posters are avid fans of truly OBSCURE bands/artists. The concept of a Pretenders record being more "overlooked" than their favorite records, cut by musicians who toil on completely unnoticed by almost anyone, seems offensive. Hence the tart responses.
But there is a interesting question buried in there: What record, with all the benefits of a high profile artist, has been overlooked by people who usually pay attention (ie A'goners) and why.
In the case of "Independents", I'd guess the "why" is because the Pretenders are more than a decade past their prime "share of mind" period. I don't know the record (supporting the OP's point), so I don't know if it deserves more attention here or not.
Duane mentions Zep's "Presence" as a candidate. My own choice for a record that suffered this particular fate is Fleetwood Mac's "Say You Will". To the extent that any 'Goners noticed it at all at the time of its release, the response here IIRC was generally hostile. Fleetwood Mac seems to embody, for many 'Goners, (understandably, but quite incorrectly IMO) all that has gone wrong with rock music since the good old days. Yet, "Say You Will" features truly sharp songwriting and consistently riveting guitar work. Even Stevie Nicks' contributions are pleasant enough.
So, in the spirit - if not the letter - of the OP's question, what other records qualify?
Marty