I reckon there’s three sorts of contested markers, and you really can’t compare because the degree of difficulty is very different.
In the forward line against zone defences is the hardest place to take them, and Lynch is probably the best.
Rucks in down the line contests usually against the opposition ruck, and that’s Gawn.
Then what is essentially a third man up in the backline but it can often end up a contested mark, or a proper key defender that just back himself in. That’s the “easiest” spot to take them as there’s generally nobody assigned to try to defend that player. Harder to pick this type. Taylor, Moore or Sicily come to mind.
Love seeing a big key player hold a strong mark and when Tom Lynch's on, he just about clunks everything. Comfortably lead the league in them this year too despite missing several games.
Dixon's another that's such danger in the air - big reason Port struggle this season was Dixon struggling to get on the field with injuries. From Freo's end we've been blessed with strong markers with Taberner, Darcy and Fyfe all standing out in that department