I've always thought that L.A.'s and Melic's Johnny Wesley was the same guy as Chicago's Vivid's Johnny Wesley. As Chicago's and VJ's Richard Parker was VJ's L.A. office chief producer, who produced both Wesley and L.A.'s Fred Hughes. I wonder if Wesley's Vivid cuts were produced in L.A. I never thought that their voices were from 2 different singers.
Both his Vivid cuts and his Melic cuts were produced by L.A. producer, Lee Young. So, either Parker brought Young and his artist , Wesley, to record for VJ, or he leased the production from Young. Wesley, also went by Westley for a period, was a big favourite on the nightclub circuit in L.A. from 1964-70. The Four Tees were his back-up group. He had excellent range in his voice, and sang in different registers/keys for different music genres. He sang in a higher register for his sweet Soul/R&B songs, but sang in as much deeper key for his straight Blues, and Bluesy R&B. I really doubt that his Vivid cuts were sung by The Four Tees' lead, with Johnny in the background, or missing altogether. If that were the case, they would have had just credited "The Four Tees", or "Johnny Wesley's Four Tees. As I remember, VJ did have a couple cuts credited to just The Four Tees (who also recorded for Modern Records.
Wesley's "Girl With The Red Dress On" on Vivid, is his most Bluesy Vivid cut, and is sung on a really low key. The flip, which is less Bluesy, is sung at a slightly higher register about half way between "Girl With The Red Dress On" and his much higher Melic Sweet Soul cuts.