I think Greta Van Fleet is pretty good. Sure the Zepp and Aerosmith is in their sound, and as young as they are, I am sure some of those influences just bleed into stuff, even if they aren't purposefully trying to sound like anyone.
Hell, Dream Theater isn't trying to sound like Rush and some other bands in their early stuff, but they do. It just happens. I enjoy GVF for what the band is. A young rock band with swagger and some good hooks. We'll see how they develop!