This seems very subjective. When you say Premiere is it by "luxury" / room quality? By "location"? By "points chart"? "Availability"? Amenities? Dining? Pool quality?
I've actually consider Riviera a top tier resort and comparable to VGF in many ways like luxury, proximity to parks, and only places where both 1BR and studios sleep 5 (Poly now in that bucket too with the tower). I believe Disney cash rates also support that and are very close to VGF. I hate the restrictions, but love the resort itself!
For what it's worth, I asked an AI (Grok) to rank
DVC resorts specifically by "luxury" and it came out with e following info/ranking:
Based on available information, guest feedback, and key luxury indicators such as architecture, dining options, pool complexes, spas, and overall ambiance, here is a ranking of DVC resorts at Walt Disney World and beyond, from most to least luxurious. This ranking focuses on the DVC properties specifically, not the associated Deluxe resorts, and considers the experience for guests staying in DVC villas.
[and then it ranked the resorts as follows - I'm omitting the extra commentary on each resort]
1) VGF
2) RIV
3) VGC
4) AUL
5) AKV
6) Poly (commentary includes tower)
7) BCV
8) BWV
9) CCV
10) BRV
11) BLT (commentary notes ongoing refurb may affect ranking)
12) SSR
13) OKW
14) VDH (dinged due to fewer amenities)
15) HHI
16) Vero
17) CFW (dinged on limited dining, bus/boat transportation, and less upscale theming)