The best cherry pipe tobacco is the one you enjoy the most.
If I were to guess, I'd guess that cherry aromatics are just behind vanilla ones in terms of numbers of blends.
Take a chance & give a few of them a try.
G&H Top Black Cherry, MacBaren 7 Seas Red, and CAO Cherry Bomb are ones I see frequently mentioned.
But if it were me looking for cherry baccys to try, I'd check out some of the small B&M blenders like Uhles, Milan Tobacconists, Peretti, pipeworksandwilke, and Boswell.
Either check their websites, or give them a call.
I'd ask them for their best selling cherry blend & order a couple ounces.
You'll find out what the best is pretty quickly.