I wouldn't say Thing is that much superior to Blob. Blob is severely underrated. I don't even think Thing could forcefully move Blob without taking the ground with him. It even took Hulk a long time to do so. And with Blob's damage-soaking abilities, he could prove a match for Thing. Or at least to completely distract him.
But yea, for the most part: Thing >> Blob, Mr. Fanstastic >> Thing.
Although I don't think there's much to separate Blob and Thing, I'd give Thing the majority if he gets creative in finding a way to hurt Blob...Blob's too slow to really pose a threat, the only problem is getting past his extreme durability.