I need help with a couple situations that tend to show up in more tourneys then I would like.

1. big stack chronic limper acting 1-3 people before me. This is the guy who just has to limp into most pots just trying to hit something (and sometimes with big hands also). For the most part will call a 2-3x raise pre, but only raises their big hands if it has already been raised. This keeps me from being able to constantly raise the blinds behind me. Cant really punish a big stack who likes to call unless you have a big hand, but those aren't always avaliable. How do I get them to stop limping?

2. sitter acting 1-3 people behind me. standard raise cant happen anymore cause someone thinks i am just attacking a dead blind when in reality, i am just attacking a blind. Also, my blinds are attacked more if the person directly behind me is the sitter. I just can't justify a push with a marginal hand to convince them to stop. What is the best play here? Do I just wait for A10+ to push the raise to tell them I will defend it or should my push range be bigger?