Hi :-)
You should post the telescope, what you have, and where you're at :-)
A 32mm Plössl 52° would give you the largest field of view on a 1.25" focuser.
32mm for the largest overview (40mm Plössl just have a narrower afov).
(Random links, ymmv. Check recent item and seller ratings.)
On a 2" focuser, a Erfle (65°-72°), but they cost a bit more (even via Aliexpress $40-$50 unless on sale).
Clear skies!