I'll take lower OVR guys all day. They're cheaper and more likely to sign a second LT contract.
The only two times I pay attention to OVR is when 1) planning future season budgets since OVR is the only factor in a players contract demands which makes predicting contract costs very easy and 2) planning for whether or not I'll get a comp pick if the guy walks.
One of the holy grails in HDB is the extremely low DUR C's that got two DITR bumps who have god tier defensive and offensive ratings. They can't contribute much in the regular season but who cares, they'll crush it in the playoffs. They're practically a sure thing to re-sign and only cost $1-$3M.
Guys like
Louis Graham (who paradoxically wasn't great in the playoffs but that's probably just a sample size issue)