For me it's not that complicated.
Best bowling All Rounder : Imran, much better batsman than Hadlee and brings more to the teaam with reverse swing that Hadlee would.
Best two Fast Bowlers : Malcolm Marshall and Glenn McGrath, easily for me better bowlers than Hadlee who proved themselves the world over in all conditions and who were the main reasons why their teams were the best in the world... ever. Foe me I also rate Ambrose, Lillee, Trueman and Holding over Hadlee as pure bowlers, and as except for the #8 slot, selection is purely based on bowling merits, for me he is not "in the mix". No disrespect intended.
Plus as previously mentioned, I have never seen an ATG XI from a past player, historian, commentator or publication that had Hadlee in the first XI, it doesn't mean he wasn't an ATG, but just not as esteemed as or by his peers.
An no, they (especially a compilation slection lile cricinfo) cannot all be biased.