In my experience, I'm afraid they don't like resting on Amazon Swords - I had some very large plants too, but they avoided them. They hate the side of the tank too - too exposed. They prefer being eleveated in a horizontal position.
It sounds like your tank is not quite suitable for Farlowella I'm afraid.
Also keep in mind that any algae eater (Ottos aside) is almost certainly going to eat your plants and Amazon swords.
If you don't like the bushy nosed look of the bristlenose, get a female.