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No Indoor Voice:
Little kids. In Pre-school through elementary school, kids are usually taught to use their indoor voices.
It's very common for people with autism to speak MUCH louder than necessary. Because of their lack of social saviness, they may not realize they are unintentionally shouting until this is pointed out to them.
Drill Sergeants in general.
Many DIs are actually fairly quiet when they're not "on", but it's pretty much a prerequisite for the job that you have the capability to embody this trope.
They generally get quieter as their trainees get closer to graduation and become a more cohesive group; but if you screw up, they will be more than happy to remind you that they still know how.
Hans Bauge, a popular norwegian TV-debater in the 1990s.
Richard Quest, a British CNN reporter, always sounds loud, aggressive and offended when he opens his mouth, excpet that he hardly ever is. He talks about it too, in his typical manner.
Phil Davidson, who is SEEKING OUR PARTY'S NOMINATION FOR STARK COUNTY TREASURER! Here
BRIAN BLESSED IS THIS TROPE
"[Marcus Brigstocke's] friend once told him if they're not laughing it's not comedy. Well, either that or you're just not SPEAKING LOUDLY ENOUGH!!!"
Longtime meteorologist Lloyd Lindsay Young was famous for screaming HELLO (insert city name) during his weather segments; as can be seen in this example from his time at WOR-TV.
Some people have trouble controlling their volume when drunk, briefly becoming this trope. Doubly so in a loud venue.
Deaf people who have learned to speak have this problem. Since they are unable to hear, they often aren't able to control the volume of their voice.