I am referring to the numbers from the numbered image provided by @Rand al'Thor in his question, though it would be better with some freehand circles (if those are freehand, then you really are Rand al'Thor and you can control the Pattern.)
Wearing blue might mean Blue Ajah, but that is not enough. What really defines here is the kesiera on her forehead. Yes, ladies and gentlemen: it's Moiraine.
Again, the blue dress could mean Blue Ajah, but she was never Blue Ajah. Who? Egwene. How do I know it is Egwene? She is short, has long, dark, unbraided hair, and the final one is that around her neck is a necklace with what seems to be the dream ter'angreal.
By hair, coloring, and short stature, this is almost definitely Tuon.
Mat. The long, wide-brimmed hat and the jovial smile are screaming Mat. I'm sure if we could see the rest of his body there would be an ashandarei, a scarf, and some number of foxhead medallions spilling out of his pockets.
The only character in the series with only one eye
other than Mat, who has actual hair, (isn't it weird that the two biggest cursers are the ones with one eye?)
is Uno.
Thom Merrilin. Period.
White blouse? Defiant look on her face? Reddish hair? This must be Aviendha.
I might consider calling this Berelain just because of the nonexistent neckline. At the time I did this, the only major characters left were Faile and Berelain. The latter's description says she is beautiful, tall, pale, with large black eyes. I concluded that this was Berelain.
This was a hard one, and the last one I did. By the time I got here, there was a gaping hole in my list of major characters: Faile. I thought this was probably Faile, as she looked like she had a strong personality, but I didn't want to end on such a speculatory note, so I did some digging. Turns out that her description on the wiki gives here a bold nose, black hair, and high cheekbones, so if she is anyone, she is Faile.
A woman wearing a yellow dress, a braid, and a ki'sain? Looks like she just ate Mat's medallion? Check! Nynaeve.
The wide shoulders and look on his face might push me in the right directions, but it is the beard that sets it for me. A quick wot.wikia search for beard shows that Elyas and Perrin are the only major characters with beards. This can only be Perrin, who is much bigger.
Obviously this is an Asha'man because of his black coat and dragon pin. There are many Asha'man characters, but only four major full Asha'man: Logain, M'Hael, Flinn, and Narishma. Just by hair, Flinn and Narishma are out (one has braids with bells, one only a fringe of white hair. M'Hael has a clean-shaven face, so he is not this man. Therefore he is almost definitely Logain.
A slim, pretty girl that is wearing a coat and breeches instead of a dress can only be Min.
Elayne Trakand. The hair, proud look, and white lions on the red dress give it away.
Wearing poor clothes and staring daggers at Gareth Bryne. Holding what seems like his laundry...I must say, this looks like Siuan Sanche.
What really gives this away is the fact that his armor has a lion on the chest among crimson. An Andoran general is Gareth Bryne.
He wears a hadori, as nobody else in the series does. This must be Lan.
A black-haired beautiful woman wearing a white dress and looking seductively at the camera is probably Lanfear. Also, the constant references to the moon in her jewellery are a giveaway: Selene was the Greek moon-goddess.
RAND AL'THOR!