Since it is about 45 gallons this is what I would get for now if. We're you
A pair of German blue rams
15 red eye tetras
20 cardinal tetras
15 kuhli loaches

They look great though in large numbers
IMO striped kuhli loaches look much much better than any cories, and plecs. Also you can have more loaches than larger cories, and all plecs as they usually have a smaller bioload
Gold nugget Plecos do look awesome