From the sketch-heap: book-accurate Uglúk, captain of the Uruk-Hai.
"There were four goblin-soldiers of greater stature, swart, slant-eyed, with thick legs and large hands. They were armed with short broad-bladed swords, not with the curved scimitars usual with Orcs; and they had bows of yew, in length and shape like the bows of Men.
Upon their shields they bore a strange device: a small white hand in the centre of a black field; on the front of their iron helms was set an S-rune, wrought of some white metal." (LOTR, The Departure of Boromir)
"We are the fighting Uruk-Hai! We slew the great warrior. We took the prisoners. We are the servants of Saruman the Wise, the White Hand: the hand that gives us man's-flesh to eat. We came out of Isengard, and led you here, and we shall lead you back by the way we choose. I am Uglúk. I have spoken." (LOTR, The Uruk-Hai)
Jackson's films are gorgeous, but they take some liberties in the look of Middle-Earth and its' denizens; chiefly, in their material culture. The Weta team settled in on a lot of arms and armours from the late middle ages and renaissance- plate armour, sallets, crossbows, German longswords- but Tolkien drew his inspiration from late antiquity and the earlier middle ages; the time of myths like the Nibelungenlied, Beowulf, the Norse sagas, and the history of figures like Attila, Justinian, Theodoric, and so on, which heavily inform the content of his stories.
It's all mail, all the time! I've given Uglúk's gear a rather Roman cast owing to that short, broad sword bit; his helmet is a late Roman "intercisa" type, simple and suited for mass-production, adorned with a Cirth-rune S. I'm a bit torn between gladius types, straight and leaf, and the rather exciting, potent cutter that is the Congolese Ikakalaka.
I'm not completely satisfied with those shields, yet, but I like the idea of letters and numerals added to differentiate units and track personnel. Arguably, someone carrying a substantial warbow should restrict themselves to an easily-carried buckler.
If you're wondering about how he's carrying his arrows, it's an in-battle method used by English longbowmen; as you twist your body to one side, the become easily reached.