Public Enemy, specifically Brothers Gonna Work It Out and Who Stole the Show.
I've been into them since I heard You're Gonna Get Yours on John Peel as a kid thirtyfugginyearsago, and eagerly bought the classic albums even though I'm generally not a fan of rap, but I'm having one of those moments where you really stop and think and listen again and go 'fucking hell, this is genius!' Those layers and layers of noise and Chuck's booming voice and razor-sharp lyrics. Christ...