I don't intend to bring up Gaimon at nauseam, but using the link below you can see his OLH data from 2017 (click the 'Watts/kg' button)
https://www.strava.com/activities/983343009/power-curve, 6.95 W/kg for 13min10sec. A 30min effort is a different beast, and I don't know too much about physiology and the expected drop-off with duration, but I would find it hard to place that isolated Madone effort: exceptionally good for sure, but 'no one else in the world able to do it' caliber? (il Cobra Ricco may disagree

)
Looking forward to Pogacar's data indeed (hope he keeps posting).