I love a lot of those but aren't all decent east coast songs from the late 80's to mid nineties called timeless?
Opinions are subljective but again...u arent qualified to speak on Hip Hop....You disregarding EPMDs influence on the G Funk sound proves this.
This was a West Coast inspired album that dropped in 1991 by Priority records. Notice which song they have as the absolute last..

..EPMD's "So What Ya Saying" which at the time was 2 years old and from an East Coast group meanwhile everyone else is from The West/South and their songs were recent. The same song that Dr Dre would later use for "Stranded On Death Row" and Ice Cube used for Jacking For Beats. EPMD werent even gansgter rappers let alone not being the biggest on a mainstream level yet that song was placed on the album. For a song to not be timeless as u say, it sure did keep up popping up years later, so who am I gonna believe?