Not to sound rude, but most of the fan made stuff looks kinda bad... Justman's fanmade project's sprites as well...
The main thing that makes this game stand out is the quality of hand drawn animation, which no other games of this genre has seen. If you cannot draw, let alone create animation loops, your art is not going to look good.
I am interested in trying to create some quality animation loops myself potentially to have them added to the game using the undertale mod. Would anyone at all be interested in sponsoring this animated sprites? Creating somethimg like this is time consuming, so ideally, I wouldn't want to be doing this just for fun, even though I kinda want to...
I have almost no experience with hand drawn 2D animation, but think I could pull off something similiar to the quality of the OG game.
I'd post a sketch of the animation loop before bringing up any compensation to see if it's even good enough to develop any further or not.