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I've had same problems but there are some things to do that can really help. I would say the number one thing that would help is to get caught bluffing a few times. Pick your spots carefully, where you can do it for cheap. And where you know you will be called and have to show. Even if eveybody knows you are advertising for later value, you will still get action from them when you want it.
Another thing. When in late position and it's turning into a "family pot" with everybody limping in, i'll see a flop with just about anything.
One more, you say you play "tight but agressive". Maybe you are playing a bit too agressive when you have a hand? I usually make the same size bet pre flop, 3x blind if opening the pot and 4x if there are limpers before me. I say usually but not always. It makes it much harder for them to judge the actual strength of your hand. Also 3x blind will buy a lot more blinds than you think, specially if the blinds just went up.

Those three things really helped my game agaisnt the kind of player you mention. Give them a try and see how they work out for you.

peace.
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