I think Sun will win: let’s say there is a planet A between Mercury and Sun, given math in video, A is better than Mercury. Planet B is between A and Sun. Repeat until you get to the surface of the Sun.
On average the Sun is closer than Mercury, because Mercury spends 2/3 of its time further away from us than the Sun, and only 1/3 closer to us than the Sun. Mercury is closer to us than any other planet entirely because it's the closest to the Sun, which is closer to us than any planet. On average.
