Even as an English speaker, caster Jun is an absolute powerhouse.
I love Captain Flowers, and Atlus in the LCK is amazing. Monte is a classic, and well, I could list a ton of casters but I would say that basically every caster LoL pro has are insane but would love to hear your caster GOAT
Atlus/Chronicler is my favorite duo, and you can throw any other combination of the LCK casters together as well. Much like others have said they can turn a Brion series (where nothing happens for thirty minutes for the uninitiated)into a nice and chill podcast about ANYTHING, but they can also make a series sound like one of the most epic events in sports history (see GenG vs Damwon from the World’s where Shoemaker locked in Swain).
The absolute GOAT caster though is Captain Flowers. The man can do it all. From narrative, to actually keeping up with any frantic action, to playing off his co-casters. The guy has simply reached the peak level in the last couple of years