They're bottom feeders.
There's not any U.S natives that work like a pleco and stick to stuff while eating algae.
There are some natives that will graze heavily on algae (flagfish, and mollies being the most recognizeable), but none that will stick to things and scrape it off like you're thinking.
In any case, hogsuckers aren't one of the algae eating species, they eat foods that they find laying on the bottom and in the substrate, like crustaceans, mollusks, worms and bugs. They might pick up plant matter they find, but the majority of their diet doesn't consist of algae.
They might pick up algae wafers if you offered it to them, but so does my senegal bichir so I don't think that makes them similar to a pleco, lol.