In my case the answer is NO. Pills and pumps did not work. Caverject and trimix caused too much pain. However BIMIX injections work every time for me. The injection is no big deal and I am pleased with the results. The only problem I foresee is that I am seeing some plaque buildup that migh cause future problems.
Another thing to consider is your age and physical fitness. I am old, but very fit (a former triathelete). Despite never having any ED problems before surgery and one nerve spared I have never been able to get a usable erection without shots. (sort of with a pump).
I think age is the big determiner. If you are younger and in good shape, you have a much better chance of regaining function.