Yeah, " Energy Wheel" bows like BowTech' s ' Wheely' or even plain wheel bows will feel best and will be smoothest to draw........Another alternative might be the Oneida Eagle bows or maybe the Firebrand Technology bows. These are probably the smoothest drawing bows I' ve ever shot. The design of the Oneida looks a little intimidating but really is fairly simple and the Firebrand bows are VERY simple. Both still offer nice performance.
I imagine the Darton CPS and Hoyt' s Cam&1/2 bows draw smoothly as well at that draw weight in spite of being a more high performance cam system.
The trouble might be finding a shop that has a 40-50# model in stock to try.
Its been a long time since I' ve drawn a 45# bow so I can only guess at what should feel good on a bum shoulder.