Lol, I'd have to argue that the best ones were left out of the poll. Sunyshore is so wild for a city theme, but then so is Oreburgh (just… chaotic bpm).
Of the ones in the poll, I vote Canalave with Jubilife as a close second.
Off the poll… despite citing Sunyshore, I'll go for the Pokémon League building (outer). It's a delightfully calm piano tune, total contrast to most other League areas in past and future games, and it's one of the tracks that has a day/night variant, so it gets even more chill at nighttime.
Fun fact, it also uses the same chord progression as the vastly-overplayed Emotion theme from Black and White!