I’m gonna say something that you might not want to hear, but I genuinely believe it: you’ve avoided the best ones!!
I agree on PoR being just okay. I didn’t play it until years after I’d played RD and there’s a pretty notable difference. PoR kinda just feels like what they were doing on the GBA with better graphics. RD actually pushes the 3D space a lot more and has way better map design. The Laguz do reappear in RD but aren’t super plot-relevant for a lot of it and are on the whole kinda weak units (other than the super busted Royal Laguz) so they can mostly be ignored. I don’t want to spoil too much but RD does a lot of experimental things that PoR never did and the series hasn’t really done since. There are long stretches of the game where you’re swapping your entire army every chapter, and so you really gotta stay on your toes and just always play with the pieces that you have at any given time. It’s way heavier on the strategy than the RPG
I have mixed opinions on the 3DS ones. I don’t really like “skill emblem” (the super heavy emphasis on builds and reclassing many times to accumulate tons of broken skills; this was also an issue in Three Houses). Awakening I don’t like very much. Conquest was actually kinda good (horrendous story though). Echoes was a pretty package - great art, great music, just okay gameplay.
Engage is unfortunately one of the best games I’ve ever played. Every character looks like a bad vtuber and the whole thing is an assault on the eyes but… that gameplay. They gutted skill emblem and made something really tight and controlled. I played Maddening without the DLC/Online right at launch and that’s been one of the most difficult, meditative, fun, rewarding, experiences I’ve ever had with any game. I was in a trance for like two weeks straight, playing 8-10 hour days and I really felt like I had unlocked some higher plane of existence by being that focused for that long. My third eye was open