Artscroll is the leading publisher for english material in YOUR OPINION.
Personally, I hold otherwise. Feldheim has published excellent and long overdue translations of sifrei kodesh.
The Ahavat Shalom yeshiva has published magnificent Ben Ish Chai translations.
Shilo House has even translated Kad Hakemach by the master, Rabbeinu Bachya 800yrs ago!! If you can find a copy of one. Old style English speaking, unfortunately, but Kad Hakemach still!