Most Helpful Guy
Interpals is pretty good, its not a dating site, but people say if they are looking for a relationship etc usually, i used it to meet up with girls and met my girlfriend which is pretty cool i guess. Good thing about it (for most women not looking for just sex) is people aren't on it to find someone special, so you can meet people for who they really are.
Most Helpful Girl
I'll say Tinder as well but I don't like dating sites, they tend to be filled with a lot of fake profiles and bots.