Is there really any proof that oatmeal lowers your cholesterol more than any other no cholesterol food?

I wanted to ask this a long time ago, and had forgotten. A recent Q about health studies reminded me.

There are claims the fiber in oatmeal helps lower cholesterol. I don’t necessarily believe it. Sure if you eat oatmeal your cholesterol will likely be lower than if you eat eggs and bacon. But is oatmeal any better than eating any other no cholesterol food? Are there any studies comparing whole wheat to whole oats for instance? Or, vegetables, or even pasta. I couldn’t find one, but thoutgh maybe some jellies would have more information.