Hey, if you're looking for streamers who won't come out with racism during a "heated gaming moment", here are a few on Twitch that I like:

DistractedElf
Day9tv
Bluejay
RissaRants
LobosJr
INeedDivGames
FuzzyFreaks
SimplyUndrea
Drewmega
GamingOnLinux
LetsIntelligame
8BitDylan

I've never heard anything racist, or indeed overtly sexist, transphobic, etc. out of a single one of them. Most of them run tight ships in their chat too.