Not an expert, but I have a few bikes. I notice that all three bikes you cite are hybrids. While fitness level is important, I think you’d find a more aggressive posture (drop handlebars) will yield more speed. I have a laid-back hybrid/cruiser (Specialized Roll) that’s a delight to ride on the MUP, but I won’t be breaking the land speed record any time soon. I also have a Specialized Roubaix that is at least 25% faster.

Happy trails!