I've had a bit of luck finding youtubers/twitch streamers who are content to let some dead air go by if they don't have anything important to say, and definitely don't do any yelling or screaming. It's a real nice change.
Partially I'm just making this post to share the few I've been watching the most:
Jagged Appliance, a Supreme Commander player and caster.
Growling Sidewinder, a DCS pilot who goes into detail about dogfighting and BVR fighter jet tactics.
Tasteless, a Starcraft caster who plays Brood War and chess in the Korean timezone.
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i would say the slime stream, green screen, and easy bake were all pretty high prod. value stuff - they were all in a studio, and one even had a handful of paid actors