I have had all these fishes before, so from my experience
1) The Hongis will grow big, mine did not, but are very mean and also the females are "not pretty".
2) The Saulosi is a nice choice. Nice Blue male and very pretty yellow females, but the ratio for a 75gal would best be 3 males and about 9 females (or if you only want 1male then about 4-5 females)
3) The Acei was one of my most peaceful and most active fishes. The males and females look alike (another plus).
But they do grow big, I would only shoot for 4 total.
4) Rustys, there is no other fish with this color and generally peaceful (One of my males was not). The females are not bad, but OK in color.
PS---I do not like plecos in an African tank, but some people have had some success. I never tried.