I decided to make a list of mentions of curly or wavy hair in the Stormlight Archive, because I mean, why not. Side characters have been mostly omitted.
βHis black Alethi hair was shoulder-length and wavy, his eyes a dark brown. He also had knots of white cord on the shoulders of his jerkin, marking him as a squadleader.β β TWOK: 1
βNot Sadeas at all. A young man with a strong face and long, curling black hair. He carried a spear.β β TWOK: 68
βDalinarβs guards had very few lighteyes among them. That was odd. And did that one man at the door look familiar? The tall darkeyed man with the blue coat that went down to his knees. The man with the shoulder-length hair, curling slightlyβ¦β β WOR: 36
βKaladin saw himself reflected in a pan hanging beside the brick oven. Long hair with a curl to it, the tips resting against his shoulders.β β OB: 6
βHe could feel her, like a gust of wind, move up his sleeve then out his collar, into his hair. The long curls hid her, theyβd determined, well enough.β β OB: 31
βShallan glanced at him. ThereΒ wasΒ something about that wavy dark hair, that grim expression.β β OB: 39
βThe light resolved into a man with shoulder-length wavy hair, a blue uniform, and a silvery spear in his hand.β β OB: 119
ββTall for a human, with wavy black hair worn to the shoulders. Clean shaven, he has a slaveβs brand on his forehead.ββ β ROW: 1
βKaladin was tall, and Lirin was short. The younger man had that unruly hair falling in a natural curl.β β ROW: 3
ββTall male,β the Regal said. βShoulder-length wavy hair. Slave brands.ββ β ROW: 53
βAs she was thinking on this, someone entered the small tent at the edge of the dome, where they were waiting. Kaladin, with his blue uniform and shoulder-length hair with a faint curl to it.β β WAT: 13
βShe wore part of it up, wrapped around a small, scroll-shaped golden ornament with two long hairpins holding it in place. The rest tumbled down behind her neck in small, tight curls. Even twisted and curled as it was, it came down to Jasnahβs shouldersβif left unbound, it would be as long as Shallanβs hair, reaching past the middle of her back.β β Jasnah, TWOK: 5
βShe sat at his writing desk now, hair bound up in curls and crossed with four hair-spikes.β β Navani, TWOK: 52
βHis dark hair curled to his shoulders, and was matched by a fine beard.β β Gavilar, OB: 36
βThe flaps burst apart, revealing a man with fine clothing and wavy hair. Sadeas gaped, then stumbled to the side, holding the flap for Dalinar, who did not break stride.β β Dalinar, OB: 75
βHe stared toward eternity, crown on his head, the curls of his beard and hair preserved delicately in the stone.β β Gavilar, OB: 105
βAt the pavilion, Sadeas walked out into the night. He had removed his helm, revealing a head of thick black hair that curled and tumbled around his shoulders.β β TWOK: 15
βThis Sadeas was a different creature entirely, with that round face, curly hair, and lofty expression.β β TWOK: 17
βSadeas stood ahead. The treacherous highprince waited with arms folded, still wearing his Shardplate, curly black hair blowing in the breeze.β β TWOK: 69
βHe turned to leave, and stopped short. Someone stood behind himβa stout man with a bulbous face and black curly hair.β β WOR: 37
ββYeah,β said Leyten, a tall, stout man with curly hair. βThatβs right.ββ β TWOK: 14
βA short woman in a fine dress stood on the manorβs steps, hands on her hips. She had curly dark hair. From northern Alethkar, then?β β Palona, WOR: 40
βBalat ran a hand through his curling hair.β β WOR: 45
βHer hair had dried, but she tended to keep it long and straight down her back, with only its natural curl to give it body. The Alethi women favored intricate braids instead.β β Shallan, WOR: 47
βHis hair was growing far too long; the tight black curls had a tendency to stick straight out.β β Sigzil, OB: 35