I thought zupreem fruity pellets tasted like fruit loops. lol. My budgies took a while to transfer from them to all-natural pellets, but it happened over the course of maybe 5 - 6 months
If you can get your bird to eat Roudybush or Harrisons I think they are great pellets. Zupreem natural isn't too bad either.
I wouldn't feed sunflower or safflower seeds all the time. I would reserve very few as a treat, or sprout them to remove some fat content. Organic seeds have a better chance of sprouting.
If you can get your bird to eat kale, brocolli, carrots, sprouts, and boiled egg once a week , that would be the near-perfect diet. However, it does take some planning and effort to offer it three times a day, as you should remove wet foods from the cage after 2-4 hours. Then you can also dehydrate veggies as well. They last a full day in the cage this way
Lots of birds are fussy, so the perfect diet doesn't always work, which is why pellets is important. My budgies would go crazy over Kale, but my cockatiel takes some nibbles then ignores it. My tiel does like carrots and brocolli, but sadly the raw broccoli here has not been worth buying much this winter( spoils too fast or already molding or dark in the grocery store)