Yeah I agree that it's hard to decide, and that railway=funicular includes both technical funicular's where there must be two tracks and two cars, joined by the same cable to counterbalance each other and "inclined railways where the vehicle(s) are moved by cables, but which are not necessarily a funicular from a technical standpoint".

Then inclined elevators or inclinators aren't given a definition on the wiki and if you read https://en.wikipedia.org/wiki/Inclined_elevator they are just a type of cable railway.

In terms of their form, function highway=elevator as an inclinator is better here especially where there is just a booth, or single seat or open platform instead of a larger railway car.