it's mostly very very bad
fukumoto's works are the one exception
there's like, 2 or 3 i could recommend if you're a Real Mahjong Pervert, but the thing is like, i can recommend akagi/ten to anyone they're just stunning works of fiction
none of the rest can really break the Niche barrier of "would have any real value to anyone outside of my specific hole i live in" imo. occasionally they get Other Niches As Well (saki's niche of "cute girls doing cute sports" and "often pedobait", the one that has the pope playing mahjong against hitler's... racism and southpark-esque humor, etc.) but they never rise above it like fukomoto's works can imo
i'll take any recommendations you have but i'll warn you i've probably read them and gone "this was mid"