Thanos kill Silver Surfer in one page. He shot down Thing AND Thor with friggin' eyes beam.
Yeah, I think that Thanos could take the three with a healty 7 or 8 on ten. His shield stop Sups with ease.
The only way of victory that I see is this: Thor is killed by Thanos for the group 'cause during this time, Surfer put solar energy in Sup. Now, we have a Super Superman to go against Thanos, and MAYBE he could win.