Again, where books come in useful Part 54 . "Baltimore Sounds" lists the Tangiers / Tangeers as initially: Cora Boykins, Bobby Covington, Richard Quarles, Earl Beale, and Bill Hagie. Boykins was later replaced by Elaine Jones. By 1970 the group disbanded and Quarles and Jones became Over Easy (no recordings that I know of).
The TNJs are a different group from Trenton and were led by Elijah Jones and, as well as their own 45s, did back up vocals for various Philly records including Bunny Sigler. They are on his "Love train" for example.
Instant Funk (also from Trenton) are a different group again (they too did back ups on Philly Records). They started as Music Machine. In that incarnation they actually backed up the TNJs on some of their recordings. I have a TNJs record from 77/78 (quite obscure), which further shows that they were separate groups.
It is possible, but merely speculation, that one member of the TNJs could have been in Instant Funk at some point, since they were both from the same town, but I have seen zero evidence of this.
Hope that helps.