Norton Anthology Marie Borroff Version
The Norton Anthology Eigth Edition - The Middle Ages Volume A
Published by W.W.Norton,
The section on Sir Gawain and the Green Knight features a six paragraph overview of the poem, then a full translation by Marie Borroff (1967 Sir Gawain and the Green Knight A New Verse Translation ) with abundant footnotes on most pages.
Amazon Page (9th Edition) The Norton Anthology of English Literature, 8th Edition, Volume 1