Those stand-alones you mentioned aren’t really stand-alones.  They are important to the larger story (especially Warbreaker at this point at least). Any more info would be spoilers.  My suggestion on the cosmere novels is start with Elantris (weakest Sanderson book in my opinion but still really good) and go in publication order so you can pick up one the little cameos and Easter eggs in the books.  The rate that Sanderson releases books is insanely fast ( especially compared to GRRM) so you should have plenty to keep you occupied.