Top as in top 5 in the world or better at some point. So pretty top. You make it sound like we got ourselves a brazil Molinaro.
You won't find many "top" fullbacks if your standard is one of the all time best fullbacks ever in Roberto Carlos.
Maicon was a beast, but quite a short-lived one.
But neither of them played in the same generation, so idk why you bring them up.