Zoro or Sanji
Would be most impactful and dramatic, would change every dynamic as they interact with different members the most, would also heavily cripple the power dynamic that is set up since 23 years, and also force the surving one to adapt the most as they have the most dependent dynamic
Usopp is the most narratively set up but in such a way that is kinda expected. It would be not "bad" per se (every death depends on how oda brings it to paper anyways) but more "boring"
Same with Luffy, who only could die EoS and is also expected, as he has as many life shortening statments about him as Roger has equals
Jimbo dying would be the least impactful, bro is just there. Vivi didnt travel with them so while being more impactful it would still not hit the same
Brooke is also a low tier death since he already giving the vibe to go to one last adventure before seeing laboon and already had a life
For the rest i about the same, it would hit harder as the listed but not as had or unexpected as Zoro or sanji