Rand , Moiraine, and Lan are fine in My book.

Nynaeve grew on me before I gave up on the TV show, although there was no need to change her race. 

I would have had  Alexender Ludwig from Vikings as Perrin and just died his hair black. 

Someone like a younger Ryan Reynolds would be perfect for Matt

Lily James as Egwene

Adam Baldwin from Chuck and Firely as Tam Al Thor

Angela Bassett as Suian

A younger Amandha Righetti as Avienda

Kelly Reilly as Morgase

Natalie Alyn Lind as Elayne

Matt Bomer as Galad 

Alexandra Daddaroio as Lanfear

That's all that pop right into my head

Best is rand Or Lan for me. Worse is Egwene.