The Onyx is actually a pretty aggressive ball, comparable to the Hy-Road from Storm, except smoother at the breakpoint. I would think about the 2Fast, Tropical Heat Pearl or the Rising Star(RG). If the goal is to play straighter in the friction, than make sure to tell the pro shop guy and either go with an Over the Label type of drill to even out the backend reaction. You may even need to go to a 2" pin to pap drill with a higher polish on the cover to get it through the front. I have a Freeze drilled this way with some extra shine for just such an occassion, sometimes it works and other times it doesn't.
My choice would be one of these 3 balls with a stacked layout for use when the Onyx starts burning up too early and a cleaner look thru the front and "rev up and flip" is needed downlane. But that's me. Experience is teaching me that sometimes playing outside of your "comfort zone" is what's required to score no matter what ball you throw.