Drive on Moscow (until extra campaigns show up)
Lords of Waterdeep
Sonic 2 (remastered)
Tomb Raider 1 (depending on whether you have a controller or not)
Panzer Corps (again until extra campaigns show up)
Final Fantasy V
Statement: Star Wars has 2 characters with strange use of grammar: Yoda and HK-47. I pick HK-47 for it is meaner.
“Honestly, I was never terribly good at games.” - Finch (PoI S2E16)
This thread could be a mile long with good games that don't have IAPs. Even though the IAP route has been growing and growing, there's been plenty of devs that have taken the premium route. And probably could look at any game published from before 2010 or so. I'm not sure when IAPs were allowed. But there's a ton of great classic iOS games without IAPs.
I couldn't even begin to list them. Look at past GoTY threads. You'll see the games that did well. Search them and you're bound to find that most of them don't have IAPs (this community generally likes the Premium route - with some exceptions).