Gannicus and Jake should definitely meet. He's lost a bunch of people close to him in the past year, he's got a pretty fluid sexuality, and he's a solid drinking partner.

Honestly, Jake has probably had him/seen him in the drunk tank at least once.

Goodnight Robicheaux might also be good. He's older than Jake, but gay and dating/living with/practically married to a fellow cop. He's got wise words and shit.