Which of Jupiters moons would look brightest from the surface of Jupiter?
I would expect Europa would, because it’s one of the four large moons and it’s covered with ice so it’s got a bright surface (high albedo). It would not be the closest moon, because the majority of Jovian moons are almost invisibly small and were only detected recently with spacecraft probes. The largest four moons are big enough that Galileo Galilei could see them with his first primitive telescope, barely more powerful than modern binoculars.
