Sadly for me I don't have many lady bugs in the area. I've only seen one, however there are other useful insects like a few spiders that will help control the flying insects (such as mosquitos and flies).
The lizards are quite good. I have a LOT of anoles where I'm at, but they aren't exactly guard dogs either. lol The lizards do eat the ants, but there isn't enough lizards to eat all of the ants, so I assume they get full quickly and stop caring about them. Either way, lizards will generally eat anything that is smaller than them.
The only insects I handle myself are the wasps.