Wow! Your images are pretty complete. Let's see if I can give it a try.
Tex: I imagine him as a detective-looking type from the 40s, no facial hair, sort of looking like William Holden in Sunset Boulevard. I picture his hair as a dark brown and cut short as normal. He is almost 6 foot.
Pat: I don't have a clear picture of her face, either, but I do picture her with dirty blond hair, just past her shoulders, wavy. I think of her definitely with an aristocratic air. She is about 5 foot 5.
Cleostra: She looks much like an angel with curly light blonde hair, almost platinum. She is short, maybe five foot and thin. She looks as if she couldn't lift very much
Jerry: I don't picture him as very tall at all. He has brown hair. He seems to me like a square who pretends he is 'with it'.
I picture him as an Archie-looking type, minus the red hair.
Skipper: He looks to me like a stubby New York type. I don't have facial features in mind, but I think of him as a not as cartoony looking Mario from Super Mario. He's not wearing a plumber uniform, though!!
G47: He looks exactly like Peter Lorre. Creepy, pudgy, threatening and evil. They allowed them to be much more evil than people realize back in the day. Very dark, but I love it!!
And here we come to the
Commander: She is lovely, model type, perfect. She also looks like an angel, but a young adult angel! Her hair is also very blonde, but her hair is to her waist. She is smart, and has some clever quips, and I almost wish that Jerry and she would fall in love so she could always keep him in his place!!!!