Benefit of published papers for grad admissions
Any paper you publish as an undergraduate is a huge benefit to your application. Most grad school applicants do not have any publications, let alone five with some first author ones. You're way ahead of the curve, and it should make a very substantial positive difference in your application.

Of course, this does not constitute a guarantee that you will actually be admitted to the very best places. Other factors go into the consideration as well, but having read several hundred applications, I can tell you that your publications will be seen very positively.