As someone who has been a fan of the series for 20 years and owns every episode and movie of DB, DBZ, GT, and Super, I honestly feel when I look at the entire series objectively, my ranking stands as this: DB>Z>Super>GT.
The original Dragon Ball with Kid Goku and friends and the more mystical martial arts adventure theme had the best overall writing, character development, and fight choreography. Dragon Ball Z had the fantastic sci-fi elements, massive lore expanding into space, especially regarding the Saiyans, Frieza’s empire and the Namekians, and of course the amazing over-the-top battles, dramatic moments, and iconic transformations. Super gave us a whole new god hierarchy, new expanded lore revealing multiple universes, god ki, several cool moments, family man Vegeta, and one of the most twisted and insidious villains in Zamasu/Goku Black. ANd oh yeah, can’t forget that crazy 80 fighter free-for-all tournament and major character growth for Frieza.
GT had amazing ideas and concepts but overall poor execution of said ideas. However, Baby, Super Saiyan 4, and the concept of the corrupted dragon balls and the shadow dragons as a final arc to the entire series were the big accomplishments and I do appreciate them. Meanwhile, Super suffered the setbacks of retelling the movies in its first two arcs which was a mistake, as well as poor, rushed animation at early parts especially the RoF arc and the bad taste left in many fans’ mouths with how Future Trunks and Mai went back to the future to live with their duplicates in a broken timeline.
That all being said, I prefer Super over GT because while both had serious flaws, I feel that Super overall had better usage of most characters instead of being the Goku show like in GT. Also, Super as a whole had more entertaining fights and memorable moments in my opinion than GT did. Let’s also not forget Super had a total run of 131 episodes to GT’s 64. But damn does GT’s ending mop the floor with both Z’s and Super’s though.
Hopefully, whenever the Super anime finally comes back, it will be better than the first iteration. If the Broly movie and Moro arc in the manga are any indications, I think it will be.