The three most commonly available 127mm LF lenses are probably the Wollensak Raptar, the Kodak Ektar and the Rodenstock Yasaron. The Graflex Optar is almost always a rebadged Raptar - although somtimes, a Yasaron can be found too. Each of these lenses was pressed into service on Speed/Crown Graphics only reluctantly. That they seem to have lived up to this role is a testament to their chivalry and courage as none of them really covers 4x5 very well - especially at infinity. Actually, I suspect that the fact the the lenses didn't, strictly speaking, cover 4x5 was overlooked due to practical considerations related to the nature of press photography in the 1940's and 50's coupled with the fact that most lenses of the tessar design have a much larger circle of illumination than their circle of good definition.
As jimgalli said, a modern, coated 135mm plasmat is far superior. They're not really significantly bigger or heavier and need not cost a lot more either. The Tessar formula lenses do have a characteristic look though.
Hmmm, I think I just decided to sell that lovely old Xenar that came on my Crown Graphic....