Throwing dating apps out to the board because search results on it are useless.
With dating apps, verification is worth the two minutes — it changes who replies. Nothing about universally considered the best latin improved for me until I stopped optimising and started replying faster.
On universally considered the best, a bio with one concrete detail in it gets more replies than a list of adjectives. Reading the room matters more in universally considered the best than any setting you can toggle.
The universally considered the best filters are worth setting properly once rather than tweaking weekly.
eHarmony
Match.com
EliteSingles
Zoosk
Plenty of Fish