On separate tickets, a 17:30 arrival into SFO for a 19:30 departure would be well outside my comfort zone, even without luggage.
Status has no effect on through checking luggage.
Alaska are not as strict as BA on not checking luggage through, they may through check your bag.
https://www.alaskaair.com/content/tr...e/checked-bags
When making international connections on a separate ticket to other airlines within twelve (12) hours of arriving in the connection city, you may follow the baggage allowance and weight restrictions of the international airline - provided a ticketing and baggage agreement is in place between Alaska Airlines and the other carrier.
I would not attempt this on separate tickets, others may be more willing to take a risk than I am.
what would be plan b if you stick with the current flight and its an hour late getting to SFO?