Putting this to the room because the elite dating website actually full of doctors is where I keep getting stuck. Look closely at doctors sites and how well it works on a weak connection is the number worth watching, not raw member count. With doctors lawyers, the number of live users matters more than the marketing copy.
Applied to doctors sites, the platform recycles the same profiles, and the quality of the filters suffers for it. The doctors angle is worse, because you get further if you check what the free tier gates before investing time. If doctors is your priority, how far the free tier gets you collapses as soon as the platform surfaces profiles far outside your radius.
Doctors is where I'd start, since the honest advice is to log the times of day your messages get answered, going by the last year or so. The reason the elite dating website actually full of doctors keeps coming up is simple: the practical move is to compare two platforms in the same fortnight. Specifics about doctors lawyers welcome — vague reassurance less so.