What kind of Kentucky bluegrass? There are over a hundred different cultivars--from very good to very bad. Same for perennial rye. And fine fescue--or did you mean tall fescue?
Our local university recommends you keep the rye at 20 percent or less--otherwise it tends to dominate the stand during the first few months and you end up with almost zero bluegrass. I am not a fan of fine fescue except in well-drained, low-fertility, low-sunlight, and low-temperature situations.
I have heard good things about "Northstar" KBG, and "All*star" per rye. But you have to match your grass to your conditions and climate. And try to get high resistance to any local disease and insect problems.