For diversity, in a 75-gal you could go with 3 to 4 species with 4 fish per species (try to aim for 1male/3female if possible); (or more than 4 fish per species if intending to overstock).
Due to the size bumblee's attain (7-8") you may want to omit these.
In the wild, the red zebra is typically a dimorphic species (blue males, orange females, considered to be the original form of this fish)...the 'orange' morph for both genders has become the most popular/common in the hobby (to the point where it's actually hard to find blue males in many places).
Female saulosi and red zebras bear a similarity and may pose a hybridization potential (not a problem if you don't intend to keep fry)
Power blues are also known as pseudotropheus socolofi.
Of your list the most aggressive species are the power blue, red zebra and bumblebee and all the species on your list are compatible with each other.