Probably the Chosen Few or The Devonnes.
You're making the point but missing it at the same time. Why do you think these classic oldies nights do so well? It's because that's what the majority of people want to hear - they want to hear records that remind them of when they were young and are not interested in hearing newies and unknowns. That's a fact, it's not an opinion. I went to one of these so called Northern Soul & Motown do's that they hold in our village every 3 months, it was rammed, and it was terrible, I've never been since because I personally do not want to hear Do I Love You and The Night, however, the other 300 people in there really did want to hear them. And who am I to slag them off?