Hartline has a very tough match-up this week against the NYJ, who are allowing the fewest fantasy points to WRs this year. You can cross him off the list based on that I think.
I usually don't recommend flexing a tight end, but Rudolph is probably your best bet to get touchdowns, they don't call him Rudolph the red zone reindeer for nothing. I might go with him based on that. My only worry is that the Vikings passing game looked awful last week against the Cards, so Rudolph got the goose egg. I watched that game though, and he was targeted in the end-zone. He should have a better game this week.
Gibson seems to be the main man in StL with Amendola out, so he should get a lot of looks in a game where the Rams will have to pass to keep up against NE. I could see going with him too, but I'm leaning slightly towards Rudolph.
Here's mine: viewtopic.php?t=527243
QB: R Griffin III, A Luck
RB: A Foster, F Gore, T Richardson, K Hunter, M Hardesty, A Green
WR: V Cruz, M Austin, P Garcon, S Moss, B Hartline
TE: J Witten
K: Matt Bryant