This stuff is present in a lot of hip-hop. The classic ("your favourite rapper's favourite rapper") is probably MF DOOM. Each line is so full to the brim with rhymes that it almost feels like each syllable matches with either the line before or the line after, and there are lyrics where he's rhyming against Icelandic volcanoes ("Catch a throatful from the fire vocal // With ash and molten glass like Eyjafjallajökull") or scientific chemical names ("One for the money, two for the better green // 3,4-Methylenedioxymethamphetamine").
That said, while DOOM is the obvious example, I'd like to throw a personal recommendation out as well: Ivy Sole is criminally underrated as an artist, especially her lyricism. Lines like "No second coming of Lauryn I got bigger // Hills to climb, no disrespect but it's my time", or the election metaphor later on are clever, but also beautifully smooth and fit in so well with the music.
That said, while DOOM is the obvious example, I'd like to throw a personal recommendation out as well: Ivy Sole is criminally underrated as an artist, especially her lyricism. Lines like "No second coming of Lauryn I got bigger // Hills to climb, no disrespect but it's my time", or the election metaphor later on are clever, but also beautifully smooth and fit in so well with the music.