I'd probably end up in Sanchez's camp, though I wouldn't mind backing Guillier in the general.
Navarro has some good policies, but backing the current regime in Venezuela is kind of a disqualifier for me. Artes is very lol (going from Marxist-Leninism, Maoism, ect). not a fan of neoliberalism so glad that Goic and the Christian Democrats decided to lose on their own. Kast is particularly grotesque and Pinera's presidency seems like a disaster.
so if I had to rank,
[1] Sanchez
[2] Guiller
[3] Navarro
[4] Artes
[5] Goic
[6] Pinera
[7] Kast