Hezrou: CR 11. AC 23, Touch 9.
Bebilith: CR 10, AC 22, Touch 9.
Glabrezu: CR 13, AC 27, Touch 8.
Nalfeshnee: CR 14, AC 27, Touch 9.
Retriever: CR 11, AC 21, Touch 11.
Vrock: CR 9, AC 22, Touch 11.
Here's a handful of CR 8-15 beastie from MMIII,
MMIV*, and MMV (one for every letter of the alphabet that I could find):
* Apparently this one doesn't have a "list of monsters by CR", or at least my copy doesn't, even though it says so in the ToC.Arcane Ooze: CR 9, AC 3, Touch 3
Bladerager Troll: CR 8, AC 25, Touch 12
Cinder Swarm: CR 13, AC 25, Touch 24
Deathshrieker: CR 15, AC 28, Touch 28
Eldritch Giant: CR 15, AC 32, Touch 9
Forest Haunt: CR 10, AC 11, Touch 11
Grisgol: CR 15, AC 28, Touch 9
Hobgoblin Warsoul: CR 8, AC 20, Touch 14
Illurien: CR 15, AC 24, Touch 16
Justicator: CR 13, AC 26, Touch 12
Lumi Crusader: CR 8, AC 21, Touch 9
Mockery Monarch: CR 14, AC 34, Touch 25
Nozgug: CR 8, AC 14, Touch 9
Ball of Arms Man Odopi: CR 14, AC 28, Touch 14
Prismatic Roper: CR 9, AC 22, Touch 11
Ryklar Harridan: CR 9, AC 24, Touch 10
Shimmerling Swarm: CR 8, AC 24, Touch 24
Thoon Elder Brain: CR 15, AC 26, Touch 11
Ultroloth: CR 13, AC 21, Touch 13
Woodling Druid: CR 11, AC 28, Touch 13
Xylophone: Because X is always for xylophone