You guys pretty much mentioned all the ones I like, so...
I had the pleasure of beta testing for Ravenmark (should be coming out this week) and it's probably one of the best TBSs I've played on iOS. It's not an easy game by any means. It uses a very intuitive system and you will get flanked hardcore by the AI; the archers are, also, no joke! The game required me to create formations and then disband them quite a bit to deal with the flanking. They definitely made a great TBS. However, the game will surely frustrate you if your'e new to the TBS genre, but it is super fun nonetheless. Also, it has an awesome story! That's about as much as I can tell you!
Also check out Patchwork Battles; it's a TBS/RPG/Crafting Sim. It looks pretty dang awesome! It, also, uses a reactionary battle system!