General_Zhaoyun, the first painting, was not draw in the time of Plato. Greeks did not make paintings like that at the time, I'm guessing that was drawn in the MIddle Ages, in Western Europe.
Here is a composite of the average modern Greek Face and the Ancient Greek Face.
The guy who did this is a greek nationalist, so "take it with a grain of salt".
http://dienekes.110mb.com/pictures/composites/parallels.jpgIf the link does not work, check out the image URL here.
As you can see, even the average modern Greek could be an Arab, Persian, Armenian, Southern Italian, Spaniard, etc.
The ancient Greek image matches up pretty well...but this tells us nothing of the skin color or eye color, but as I said, if you look at who these people intermixed with over time, I doubt the skin and eye color changed much.
Pictures of modern Greeks.
http://www.aueb.gr/deos/EIBA2002.files/PHOTOS/photos.htm

Pictures of Modern Persians
http://www.nipoc.org/events_past.htm#jul06


Also The Greek Historian Herodotus said that when the ancient Persians attacked Greece:
QUOTE
” Descriptions of the contingents of the Persian army and allies, including commanders and types of armament (61-80). 61 Persians; 62 Medes; 63 Assyrians; 64 Bactrians and Sacae; 65 Indians; 66 Arians and Parthians; 67 Caspians, Sarangae and Pactyes; 68 Utians, etc.; 69 Arabians and near-Egyptian Ethiopians; 70 Eastern or Libyan Ethiopians; 71 Libyans; 72 Paphlagonians and Cappadocians; 73 Phrygians; 74 Lydians; 75 Thracians; 76 Pisidians? ; 77 Cabalians and Milians; 78 Moschians, etc.; 79 Marians, Colchians, etc.; 80 Red Sea islanders. Command levels by multiples of ten (81). The high command is described (82). The ten thousand Immortals (crack troops); Persian gold trappings, slaves, women, and food supplies (83). Cavalry (84). The Sagartian cavalry and their lasso use (85). Other cavalry contingents; cavalry, chariots, and camels (86). Total cavalry said to number 80,000 (87). Cavalry commanders; the accident of Pharnuches (88). Description of ships in the Persian navy, and armaments of the marines (89-98). Total triremes (warships) said to number 12,007. 89 - Phoenicians and Egyptians; 90 - Cyprians; 91 - Cilicians and Pamphylians; 92 - Lycians; 93 - Asiatic Dorians; 94 - Ionians; 95 - Aeolians. The superiority of the Phoenician navy; Hdt.’s decision not to name the native commanders (96). The admirals and other naval champions. 3,000 smaller ships (98). Queen Artemisia of Halicarnassus; her wisdom and courage (99). Xerxes reviews the troops on land and sea (100).”
Persia was already clearly a mixed ethnic and even racial society with Egyptian, Ethiopian, Arab. At that time Ethiopian could be generic for "black" or anyone from Africa outside of Lybia and Egypt...
2 things are obvious.
In modern times, there is much overlap in the appearance of Greeks and Persians.
It is also true that historically Persians (due to location and reach of empire) was far more mixed in population.
I would say it is not an issue of if Ancient Greeks looked more like Persians, but the other way around, as Ancient Persians were already quite mixed even in ancient times.