I complied the answers from my "Members with the best stage presence within these groups" thread where I asked users if they considered themselves a fan or not of certain groups and who in the group they thought had the best stage presence. I also used a couple of the answers from this thread: "Members who people unanimously think they have the best stage presence" which inspired my thread. In total this result is based on ca 45 users opinions but a lot of users didn't answer for all groups. If a user mentioned multiple members I usually included all of them in the statistics, depending a bit on how the user formulated their answer.
Disclaimer: As you can see below some fandoms only had a small number of users who posted in the thread. I'd take any result collected from less than 10 users with a big grain of salt.
BTS (number of fans: 21, number of non-fans: 21)
Fans: 1. Jhope (57%) 2. Jungkook (29%) 3. Jimin/Taehyung (19%)
Non-fans: 1. Jungkook (52%) 2. Jhope (29%) 3. Jimin (24%) 4. Taehyung/RM (5%)
Blackpink (fans: 17, non-fans: 24)
Fans: 1. Lisa (88%) 2. Jennie (41%) 3. Rosé (6%)
Non-fans: 1. Lisa (71%) 2. Jennie (25%) 3. Rosé (13%)
NCT (fans: 6, non-fans: 24)
Fans: 1. Taeyong (100%) 2. Ten/Mark (33%)
Non-fans: 1. Mark (46%) 2. Ten (38%) 3. Taeyong (33%) 3. Haechan (13%) 4. Yuta (8%) 5. Yangyang/Lucas/Xiaojun (4%)
Twice (fans: 15, non-fans: 26)
Fans: 1. Jihyo (80%) 2. Nayeon (40%) 3. Sana (27%) 4. Momo (13%)
Non-fans: 1. Jihyo (42%) 2. Momo (35%) 3. Nayeon (31%) 4. Sana (15%) 4. Mina (4%)
Stray Kids (fans: 10, non-fans: 19)
Fans: 1. Hyunjin (90%) 2. Bang Chan (20%) 3. Felix/Changbing/Han (10%)
Non-fans: 1. Hyunjin (53%) 2. Felix (26%) 3. Bang Chan/Changbin (16%) 4. Han/Lee Know (11%)
Red Velvet (fans: 8, non-fans: 27)
Fans: 1. Seulgi (100%)
Non-fans: 1. Seulgi (77%) 2. Joy (17%) 3. Wendy (10%) 4. Irene (3%)
Itzy (fans: 11, non-fans: 31)
Fans: 1. Yeji (64%) 2. Ryujin (36%) 3. Yuna (9%)
Non-fans: 1. Yeji (65%) 2. Ryujin (48%) 3. Yuna (10%)
EXO (fans: 10, non-fans: 19)
Fans: 1. Kai (90%) 2. Baekhyun (40%)
Non-fans: 1. Kai (84%) 2. Baekhyun (16%) 3. Lay (5%)
Aespa (fans: 5, non-fans: 31)
Fans: 1. Karina (80%) 2. Ningning (20%)
Non-fans: 1. Ningning (55%) 2. Karina (19%) 3. Winter (16%) 4. Giselle (6%)
Le Sserafim (fans: 13, non-fans: 27)
Fans: 1. Chaewon (79%) 2. Yunjin (46%) 3. Sakura (8%)
Non-fans: 1. Chaewon (67%) 3. Yunjin (33%) 3. Eunchae (4%)
Result: So after this whole thing we can conclude that yes, fan and non-fans agree on which members have the best stage presence. For majority of the groups the ranking was more or less the same for non-fans and fans, the difference that existed most likely due to the small sample size.
The only two groups that had any real divergence was BTS and Aespa. In Aespa's case only 4 fans answered so I wouldn't put any stock into the result. I was originally gonna exclude Aespa from the thread because of it but since there was a good number of non-fans who responded I thought the result could still be a little interesting. So BTS is the only group with a credible difference between the two results. Jungkook is the clear favorite among non-fans while Jhope is considered the best within the fandom.