Over the cores of reading stormlight I have listened to some song that I though would go Well with certain scenes of fit certain themes or characters. Over all I belive most of the song should be orchestral in nature.
In the prolog of way of kings with seth I always though this song from Ghost in the shell would work well. The songs drums could correspond to the drums the parshendi are playing with the volcals coming in as soon as Szeth start's killing. I think it would be cool if the drums come back later during Szeth's rampages as well as during parts where the thrill is present as well as the Parshendi army.
Another song That reminds me of Stormlight is The Beginning of the End / What Becomes of Us from Final Fantasy Type-0
For some reason I always imagine the song staring as we see Gavilar's Corpse on the ground ushering in the start of the war.
The Theme at 3:15 wile maybe slightly over dramatic might work well as an Overall nights radiant theme.
Here's another version that slightly more combative .
Abyss watchers From dark souls I think goes very well with The Day of Reckoning flashback Dalinar has. The song to me is beautiful enough to present The angelic wind runners Crashing to earth yet dark and unnerving enough to show massacre to follow.
The opening parts of The dragon Boy From Spirited Away(0 to 1:40), reminds me of Shadesmar and shallan discovery of the that place.
Magna Insomnia From Final Fantasy XV Always fit The End of words of radiance. The beginning Starts with Adolin fighting on the ground while Kaladin fights above. At 1:50 the Sence changes to Kaladin and Szeth in the storm then at 3:10 Kaldin and seth break the storm revealing a heavenly landskape with a setting sun. At 3:47 Kaladin and seth Fight culminating in Szeth getting hurt and fleeing into the storm. At 3:52 the sence swich back and forth between Kaldin chasing Szeath in the storm and Shallan attempting to save the army using the oath gate.
Finally I think the Lost elf theme from Dragon Age Inquisition Trespasser would work very well as a cultivation/ Serious Lift Moments Such as Gox's healing or her Confrontation with Nale.
That all I can think of right now.