Well if you are talking about strictly Ancients, you have to first distinguish between two living people as heads of the coins or Gods. Some Gods like Serapis clearly don't look like people but below Roma and Senate on a coin you are looking at can look almost like actual people.
https://www.acsearch.info/search.html?id=6283888
Now for actual Roman coins, there are famous examples. The early coins of Rome there are quite a few, and Augustus's provincials as well. After that they are really hit and miss. Aurelianus and Vabalathus for example.
https://www.acsearch.info/search.html?id=6283888
Now for actual Roman coins, there are famous examples. The early coins of Rome there are quite a few, and Augustus's provincials as well. After that they are really hit and miss. Aurelianus and Vabalathus for example.






















