Salem Travelers - 'Wade in the water' on Halo
Gospel Nikias - 'Get Jesus on my side' on KB
Billy Watkins - 'Judgements comin' on Schnipple Up
Jean Johnson Singers - 'Let your love light shine' on Hummingbird
Amazing Farmer Singers - 'On fire for Jesus' on HLF
Jame T. Horn - 'Glory bound train' on Modo
That Lovers of God 45 already mentioned is absolute killer - both sides. And the Kindly Shepherds is great too - appeared on a compilation by Checker in 1967, which is decidedly easier to get hold of than the 45.
Plenty of quality modern soul/crossover tracks by Gloster Williams, Voices of Nashville, Together, Rodena Preston, The Pattersons, Michael Orr & the Book of Life, Souls of Solomon, Truth & Devotion etc