205 45 R16 is as close to stock size as you will get buddy however i just put 195 45 on my 16 inch rims coz of the difference in tyre price and it doesnt make that much of a difference.
215/45/16's are .1% closer to stock than a 205/45/16 but the 215's are taller than stock, the 205's end up being shorter. If you can find a 215/45/16, it wouldn't be a bad option because you have more grip, but 205/45/16's are much easier to find.
Don't go for the 195/45/16 because they will give you a centimeter less contact patch.