Thomas played at a level even higher than Colstin but for a shorter time. He was the most dominate receiver in the league until the injury and medical mishaps. One would not be off at all to mention Thomas and Colston together.
But Thomas isn't Colston that is the thing, He was well on his way to surpassing him minus the ring. But if Thomas can come back he still has a chance if he can reach that level he was on before the injury.