FYI, there are only the two species of Rams(currently)
Mikrogeophagus Altispinosa-aka Bolivain Ram, butterfly ram
Mikrogeophagus Ramirezi- aka blue ram, GBR
angel rams are often Balloon rams (a genetic variety of the GBR) or Veiled Blue rams(long finned variety)
the Electric blue is a color variant of the Blue ram.
as far as keeping them together..you can..but keep in mind there are some differences between the 2 species in terms of conditions. there is overlap in temperature but basically the Altispinosa (bolivian) prefers sightly cooler water than the Ramirezi(GBR)
also the more you keep together of the species you increase the chance of pairs forming and aggression as a result.
disruption with structure in the tank will help to reduce the issues.. usually line of sight disruption(aka cover)
you may still need to deal with possible aggression issues and may need to remove some of the rams.