What type of fish would be best suited for a trio pairing of sashimi, crudo and ceviche?
I think the Albacore and Sea Bass are both great ideas. I'm not sure about the Swordfish. It would be fine in the Crudo or Ceviche, but I don't know how it would be as Sashimi. 

Fish that I'd look at for this are:


Yellowtail
Halibut 
Tuna
Sea Bass
Scallops (to think outside the "fish" box a little)
Salmon


I'm not sure if those are "in season" for you, and I can't find a good resource to determine that. I'd suggest getting a list of 5-6 fish and heading to your local fishmonger / farmers market / or Whole Foods and ask what's in season. Personally, I'd do Tuna, Yellowtail, and Scallops if you wanted to do 3x3.