@Mr.Bultitude If you can read the Hebrew of those commentaries that @MonicaCellio mentioned, then you'd probably want to know that you can find most of them online, for free,
here, under "תורה," for the Five Books of Moses, and under "נביאים" and "כתובים," for the commentaries on Prophets and Writings, respectively.
Sefaria is working on an English translation, but at the moment most of them are incomplete.
Is there any Mikras Gedolos in English? I am interested in learning Meforshim on Chumash, and I wanted to know if there were any online or in a store.
