Which procedure would help me achieve fuller breasts while avoiding a lift? (photos)

Hi! To be honest you need a lift. This will set the nipple in the right place and will help increase the fullness in the upper pole. At this point, I would consider fat grafting and an implant.

Dear terix1,
my preferred lift is a lollipop lift when a periareolar won't do (ie greater than 2cm lift required). The lollipop technique was created by a Canadian plastic surgeon named Elizabeth Hall-Findley and treats the breast as a three dimensional structure instead of two dimensions (anchor - lift). Most importantly it does not require the horizontal component scars that the anchor-lift requires and breasts appear much more natural, lifted, and less boxy. Lastly, the lift lasts longer because the lollipop doesn't rely on the skin to hold the breast up, its actually breast tissue thats being brought together to support the breast and hence improves longevity.
Daniel Barrett, MDCertified, American Board of Plastic SurgeryMember, American Society of Plastic SurgeryMember, American Society of Aesthetic Plastic Surgery

Because your nipples are located below your breast fold, a lift would be the most suitable option for you.