Surely the only thing that makes a hardtail a bike packing hardtail is the frame mounts?
If you’re not bothered about that, then you’re just choosing a hardtail really.
That said, from your choices….bikepacking is tough on frames – bags and straps rub over long distances. I would steer clear of carbon frames to that end, unless you want to cover your frame in helitape.
Have you looked at Surly frames – a number of them are built for bikepacking. I’m enjoying my Bridge Club for example.