Is This A Good Community Tank?

[eaglesaquarium]

By having less bottomfeeders you have lesser territorial disputes over the bottom of your tank. this has happened to me between my plec and rams. the plec was lucky to escape with only minor injuries rehomed him immediately. That is not a true corydoras. they grow bigger than cories. Brochis splendens grow quite bigger than corydoras as they reach 5 inches at max
 
Oh didn't really know that eagles, my pandas back then preferred the bottom of my tank. maybe it was a tad shallow

 
 
Pandas are the smallest of the cories, not considered 'dwarf'.  So, yes, pandas hang near the bottom.
 
 
The cory in the picture is a Corydorus paleatus (aka peppered cory).  It is a true cory.  The description is of a Emerald Catfish (aka Emerald 'cory'), which is not a true cory.
 
 
Check out these links to learn the difference between the two.  (Based on my own experience with Petsmart, I bet they are peppered cories, and not brochis splendens.   I've never seen brochis splendens in my local Petsmarts, but I have seen peppered in several different Petsmart stores around me.)
 
Peppered cory:
http/www.planetcatfish.com/common/species.php?species_id=271
 
 
Emerald 'Cory' (or Emerald Catfish):
 
http/www.planetcatfish.com/common/species.php?species_id=114
 
 
 
 
As for the idea of keeping only 2 species of bottom dwellers, I'd agree with that.  I'd keep EITHER the khulis or the Cories... with the BN pleco.  I would NOT keep the khulis and the cories.
 
 
Cories and BN Plecos will get along fine.    Rams, on the other hand, are more territorial against OTHER fish, not specific to their own kind.  If they are in too small a tank and don't feel their territory is sufficient, they can be a little more aggressive (remember, they are cichlids, after all).
 
If you go the Ram route, I would consider dropping the pleco.   I have a BN, panda cories and a bolivian ram, and everyone gets along fine, but I also have a 55 gallon tank, so there's more space for them to all coexist.  A 36 Gallon is considerably smaller, so I'd say that something would have to go from the bottom group.  
 
 
Also, to answer the question regarding the single ram or a pair, the answer is simple.  Either one male or a male and a female. Don't get two males.  Also, if you don't want fry, don't get a pair.  The rams can get more aggressive when spawning, so that would be something to keep an eye on.  Incidentally, cories are rather 'stupid' and don't seem to get the warning signs when bumping into the territory of the others... so they could be a problem with the rams, if there's a breeding pair.
 
 
I'd suggest doing a bit of research into the rams first.  Electric blues also require soft water and higher temps (they are a color morph of the German Blue Ram specie).    You really need to determine the softness of your water before going too much further in the stocking plan.  Hard water will pretty much eliminate the electric blue rams from being an option.  

 

[DerpPH]

If rams aren't the way to go for you other centerpiece fish like badis badis or apistogramma are good choices