There are two singers from southern california that were born in 1968 and died in the mid to late 90s that I wish were still around. They both were in bands beginning with the letter S. One died in a car crash in southern california, the other died of a heroin overdose in a San Francisco hotel. Neither group tried to replace their front man.

Any idea which two bands I'm talking about?
In alphabetical order they are S*** and S******. The singers initials were LS and BN.