Agreed on Altea - they're not the best ties ever but they're readily and cheaply available, which has to count for something, right?
Also, I'd actually submit that the recent Zegna mainline ties should be moved to the top tier - the "selvedge-tip-label" versions. The older ones, definitely lower tier. It's just like how older Brionis often are less impressive than newer Brionis - only the newer Zegnas are worlds above the older Zegnas.
Finally, this was commented on earlier, but I'd mention it again: there's a LOT of variation in your "top tier" as it stands. To shoot fish in a barrel, compare Kiton/Attolini/Marinella/Tom Ford/Charvet with RT BOC or RLBL or Ben Silver.

Oh, and an interesting note: the Church's ties appear to be made by the same factory Zegna uses, or at least share care tags, construction details and sewing styles. Or at least that's been the case for the ones I've compared.