Bottom one is a stink bug. They poke holes in tomatoes, not good

You do not need any of those bugs. They are bad news. The little red ones are probably the juvenile stink bugs. I hate those things. The ones who manage to grow up in my garden run and hide when they see me coming. I use (no affiliation) the Bugzooka. It works. It is a manual process. But you can sneak up on them and POW! No harm to plants. If you do it right, no stink either. Some of the older bugs get wise to it. I had one that used to go hang out on the Side of my neighbors house until I left the garden. I don't have them yet. This is the main reason I do not grow a second crop in my zone. They take over. I try to hold them off till first crop is done. I have been researching more ways to get rid of them. I would like to prevent them.

The bottom one looks to me like a spined soldier bug, which is a predator of stink bugs and other pests. But they can be hard to tell apart from stink bugs.

Here's an old post about that: http://forums.gardenweb.com/discussions/2091925/stoldier-stink-and-squash-bugs-how-to-tell