Rabbi westhim is the responsibility of rabbi Westheime.
You get the pattern, it's worldwide.
The OU and maybe choK and OK are outliers here.
Could you explain how OU, Kof-K and OK are outlier.
FWIW, this goes quite a few years back, but I have heard from both mashgichim and from establishment owners that Kof-K was a lot more serious and stringent in keeping to their standards and having proper Hashgocho than the Star-K.
And here's a direct quote from someone on a whatsapp group that I am a member of, who works with all Kashrus agencies that certify in the country where he is located:
"The main issue with him and others like him is that they are are equipped to deal with so many plants on a mehadrin level.
"They don't have the staff and don't have the organizational skills."
"And that is how he loses the edge."
Or another quote:
"[name omitted, was on your list above] has become the default Hashgacha for anyone who doesnt want to put his own name for various reasons."