Back when JTL first rolled out the Faiba service, the TP-LINK access points they deploy was as a result of the following:-
a) ZTE GPON Router Wi-Fi Signal Limitation which they were terminating the fiber links with was extremely weak and with the rollout beginning in Karen, it just couldn't cut it. (Read:Residence Size)
c) Cost: Client having incurred 35K connection fee + fiber package cost. Propagating the fiber uplink signal wirelessly in these huge houses had to come down from a initial cost and client base consolidation sense.
c) Simplicity in terms of configuration and management (e.g Wifi password change) for the end user.
d) At the time (2011/12), TP-LINK had the most "bang for your buck" AP specifically the WA5210G model that was the cheapest/most powerful item in the local market. Thus my recommending and implementing it for them on the pilot installations.
For your case, I would recommend going with either Mikrotik or Ubiquiti products.
Major Reason: Both products use "proprietary data transmission protocols" and given the 1000+ number (I hope i read that correctly), it will most certainly be a necessity.
However, Large Scale WiFi propagation has so many factors to consider, but in the interest of keeping it simple, the actually equipment model to use will largely depend on largely these:-
Location & Topography: Any large and/or dense objects WITHIN the event area eg. Tall tree clusters, ground elevation/tilt?
Height: The higher the location of the antennas, less interference with signal propagation. How high can you reasonably get and propagate the signal downwards toward the users?
Operation: The mode in which the antennas will operate. e.g Repeater mode: meaning there is room for flexibility in terms of antenna placement instead of having everything centralized meaning the signal strength will be evenly propagated within the target area with little regard for cabling all the way back to the core router. Only the primary access point requires it.
And seeing as you mention that bandwidth isn't a problem thus data loss also shouldn't also be a concern in the overall scheme of things.
Also, I assume it will be an unsecured network? Which significantly simplifies things as well.
Budget: Sector antennas for instance are the most powerful and with greater coverage range i.e 120 degrees beamwidth in both cases but at a cost. So your operating budget is a factor. Usually a trade off between cost and strength is the most prudent course of action here.
Lastly and perhaps most overlooked, the expertise, experience and imagination of whoever is doing the configuration and setup of the hotspot is a determinant factor as well.