Pau Torres is actually left footed, didnt know about this.
Seems that hs is also on good relations with Villareal:
"The pull of playing the Champions League with the team from my town was bigger," said Torres, speaking last year. "I was clear from the start.
"This is only the fourth time Villarreal have reached the Champions League, which shows how hard it is, and it was a dream to play in the competition with my lifelong club. The president didn't put pressure on me, even though they could make a lot of money.
"He always said 'the decision's yours', that he'd respect it. I appreciate that."
If we could convice him, he would be great, actually best option from all mentioned besides Koulibaly.