i feel like the hip hop equivalent of what your getting at is layering samples, and when done well they work harmoniously even from wildly different sample sources. the masters of layering are indeed the bomb squad, but i think pete rock also built his productions to have climax moments with tons of simultaneous layers working together. for some reason, ADOR's "Let It All Hang Out" comes to mind but also can't stop the prophet remix or even straighten it out when the horns come in. maybe pete's use of horns in general gives it this feel, cuz the frequencies that horns sit in are usually given more space to breathe in other genres. but pete just throws them out front without regard to whether they will drown out other instruments, which gives it that wall of sound.

maybe company flow era El-P? prince paul? even erick sermon on dare iz a darkside maybe?