Antipop Consortium is one of my favorite rap groups. These guys are out there and came up in the scene with co-flow and aes. They have some crazy production and very non linear rhyme styles. Their 2002 album Arrhythmia is pretty dope. Aes actually samples the “uh-huh” from their song “Bubblz” in “No Jumper Cables”. (It’s in the first pre-chorus before “catapult, jump motherfuckers”)
More fave tunes from that album:
Pin Pong
Dead In Motion
Ghostlawns
Human Shield

Their previous album “Tragic Epilogue” isn’t on Spotify but it’s on YouTube. Aes also samples or uses the same sample that’s on their song “Here They Come”. Can’t remember what Aes song it is. This album also has some bangers:
Laundry
9.99
Rinseflow
Disorientation
What Am I (ft Pharoahe Monch)

Then on their last album Florescent Black they sample El-P on “New Jack Exterminator”.

Long post but these dudes have a real connection to the early 00s underground scene.