The first couple are Constantine family coins. Yeah all late Romans no question about it. You want to have some fun and figure these out quickly? Go to this
ebay listing. Open the main photo so it is big on the screen. Right click it and save it to your hard drive and you have a very high resolution image. Then open the image and blow it up then just match the profile. And that is a famous poster sold by a lot of people. I just found one where the guy uploaded a high resolution image.
http://www.ebay.com/itm/The-Roman-E...261474523781