For Lily - Theodore Nott (perfectfacade) is a Senior Healer in the Potions & Plant Poisoning Ward. At work, he is considered to be an skilled healer with an excellent beside manner, always willing to help his colleagues. He's a bit different at home but she might not know him well enough to have seen that unless she knows his kids.
For Ginny - Oliver Wood! (givemewings) Obviously she'd know him from school and he was the Seeker for Puddlemere United until he was injured severely enough that he could no longer play. He's now the head coach for Puddlemere United. So he would have played against her and probably still deals with her now! He's also pairbonded to Parvati so there's that as well.
And for both of them - Aiden Warrington. (photofan) He's a bit older than Lily but they were at Hogwarts around the same time and he could easily be one of her questionable boyfriends. :D And for Ginny, he does some work as a freelance photographer for the Prophet so she may have made use of him from time to time in that way.