How's humidity? The spot may be from spider mites, which go crazy on bananas an begin stripping it like little secret ninjas when humidity is too low. (A common occurrence indoors)
Edgar definitely needs a new pot but looks happy
Anyway, check all the leaves of your big guy closely and look out for tiny little tan colored things running around the surface of the leaves, especially around the tips and possibly developing webbing on the underside. If you do see them, you can wash off all the leaves of the banana with cold water, both on the underside and topside of the leaves. It's best to have help tipping the banana so you can do it without hurting the plant. After that, keep things more humid. Spider mites are an easy fix, but will continue to show up if the place is not humid enough.
You can also kill them with pesticides or soap and water, but, from my experience the easiest to do is a quick cold shower.