I'm pretty sure many members here would be glad to help, I'd like to help with this one but like I said the pic is too small and I can't make out the names you've put. However I still think it would be better if it was more organized, like for example if you categorize them by location and genus. Let's take Central American cichlids as an example
you could put them all in one poster and group them into genera like this:
Paraneetroplus: (some also known as Vieja)
argenteus , bifasciatus, breidohri, bulleri, fenestratus, gibbiceps, guttulatus, hartwegi, maculicauda (Blackbelt cichlid), melanurus, nebuliferus, regani, synspilus (Redhead cichlid), zonatus
Theraps:
irregularis, coeruleus, godmani, intermedius, lentiginosus, microphthalmus, nourisatti
(this is as far as I know cuz they tend to change those around)
Cryptoheros :
altoflavus, chetumalensis, cutteri ,myrna,nanoluteus ,panamensis, sajica, septemfasciatus, spilurus (Blue-eye cichlid)
Amatitlania:
coatepeque, kanna, nigrofasciata (Convict cichlid), siquia (Honduran Red Point Cichlid)
Archocentrus:
centrarchus (Flier cichlid), multispinosus (Rainbow cichlid), spinosissimus
Caquetaia:
kraussii, myersi, spectabili, umbrifera (Umbee) (Turquoise cichlid)
Hypsophrys:
nematopus, nicaraguensis
Nandopsis:
haitiensis (Haitian cichlid), ramsdeni, tetracanthus
Parachromis:
dovii (wolf cichlid), friedrichsthalii (Yellowjacket cichlid), loisellei , managuensis(Jaguar guapote), motaguensis (False yellowjacket cichlid)
Rocio octofasciata, (Jack Dempsey)
Thoichthys:
affinis, aureus, callolepis, champotonis, ellioti, helleri, helleri meeki, meeki (Firemouth Cichlid), pasionis, socolofi
Petenia splendida (Bay snook)
Amphilophus:
alfar, altifrons, amarillo, astorquii, bussingi, calobrensis, chancho, citrinellus (Midas cichlid), diquis, flaveolus, globosus, hogaboomorum, labiatus (Red devil), longimanus, lyonsi, macracanthus, margaritifer, nourissati, rhytisma, robertsoni, rostratus, sagittae, supercilius, xiloaensis, zaliosus
Herichthys:
bartoni, carpintis, cyanoguttatus,deppii, labridens, minckleyi, pantostictus, steindachneri, tamasopoensis
This is probably too much for one poster even though you won't find pictures of many of the species here, but a poster for each genus would be awesome. You could merge 2 or 3 genus with a small number of species into one poster, but there is still many to do like Cichlasoma, Tomocichla, etc.. I believe that organized like this it would be much more useful and comprehensible for fishkeepers. After Central American cichlids there is also South American and the African cichlids which are much more numerous. Damn, I just realized how much work this would be.... :S