Top 20 U.S. programs admit ~60% of their cohorts from international students, and they'll have at least 1 faculty member that understands how to read international transcripts. I don't think you have anything to worry about. They'll focus on the ranks (#1/#top 5) in your majors.
Apply to all the top 20 + a few good master's programs. You'll likely get into a top 10, especially the one that your letter-writer works in.