"Lots" was a gross exaggeration. The genre lacks on all platforms. Especially on iOS, I think, because a lot of the tactical/turn based RPGs on other platforms are mostly older games.
That being said I am looking for options myself so I will post my findings - in no particular order - below:
Shining ForceI think is the one I want to try next. If anyone ever played (old Sega title iirc?) I'd like to know if there really is that pause/cutscene
everytimeyou perform an attack in battles. I'm probably being picky but from videos it looks like it ruins the fluidity/speed of combat.
Final Fantasy- I think there are 3 or 4 out including Tactics. People rave about these games. I'll eventually buy Tactics but the price is a bit high for an ipad game.
Battleheart- I'd call that a tactical RPG but it's extremely light on story and not turn based. Maybe not hitting the genre on the nose. Pure fun to play.
Warhammer Questis on my list as well. Looks like a team-based, turn-based tactical RPG with good reviews. Never played but reviews seem positive.
War of Eustrath- also turn based/tactical with good reviews. Have not played either though. Reviews do point out that the story is good but undermined by grammatical issues. I'm usually fine with that as long as the rest of the game is enjoyable though but it can ruin a story for some.
Battle Furywas a title I almost bought but pulled back when I could not find reviews on Touch Arcade. I should have done the same for KoPP.
Finally there is
Battle of Wesnothwhich is being called Tactical RPG all over the place. I think it's more of a tactical/turn based strategy game with good RPG elements. More of a HoMM type game. Sounds quite good but not exactly the "take your 5 adventurers through dungeons and shit" style of game. The game is actually Free on all systems (windows, Linux..) but iOS AFAIK. I believe it is open source and had quite a lot of addons (free I presume) on iOS and other platforms. As you can guess I don't know much about it but that link is a good place to start I think. Will report back if/when I play it.