Ok, in that case on a 75g....something like this
Handful Amazon Sword (Echinodorus bleheri), some Red Rubin's (E.Rubin) for color, def some Narrow Leaf Chain (E. tennelus) for the front "grassy" areas, some Broad Leaf Chain (E. quadricostatus) for the middle mixed in with some Klenier Bar sword. Alternative to the broad leaf chain you could do Sagittaria, grow a lil taller but does NOT grow/ spread as fast as broad leaf chain
Maybe I'd toss in some Pennywort on the rear sides since they have nice vivid green color and round leaf's.
And then maybe....just cause its me lol i'd put a red tiger lotus in there for color (which wouldn't be amazon style really but sure adds some nice coloration)
You should find all these plants with pictures on here (or prop also in Byrons tanks I"m sure, I think he's got a Amazon set up too) Aquarium Plants
And oh yea a bunch DW
And one's that's set up...PICTURESSSS please