Matt Ryan is a good QB, and is pretty smart, but as I have said many times already, he is not special, what you see is as good as it will get (no more ceiling to talk of, and winning a playoff game proves that), so if he ever has to do it without star receiver or rb, offense is going to to take large hit.
Tannehill still needs to prove himself against a 1st string defense, but you can already see, like Matt Ryan he is a good QB, but unlike Matt, he is much more athletic, and his ceiling still high enough where you can say, if he reaches it, he will be special, a player that can will his team to win, not need all the pieces to be there for him to look good.