TopPlacers
TopPlacers returns up to n "address,count" pairs, semicolon-separated, sorted by count descending -- the leaderboard. Iterated fresh on every call rather than kept pre-sorted, since contributor counts are small enough (real participants, not per-pixel) for a plain insertion sort to be cheap regardless of how large the canvas itself grows. Gno's "sort" package predates Go's generics-based sort.Slice, so this is hand-rolled rather than using sort.Interface for a one-off local type.
Command
gnokey query vm/qeval -remote "https://rpc.sapphire.testnets.gno.land" -data "gno.land/r/g188mapat33awn7r9uk08l0jc9my0n07fpmspxel/pixels.TopPlacers()"
Result