Aziraphale and Crowley somehow check all the boxes for me in terms of a perfect ship. 

Forbidden Romance? You’ve got it. Friends to Lovers? Yep. Pining? Check. Mutual Pining? Double check. Idiots in love? I have not seen two dumbasses more in love. Slowburn? 6000 years. Historical Romance? Yes is an understatement. One thinks they aren’t good enough for the other, while the other is head over heels for them? Absolutely. Miscommunications leading to angst? You could’t find two individuals who are worse at communicating. Bicker like an old married couple? “Oh lord, please heal this bike”. Pet names? angel. Are very soft but also bastards? Yep. 

I could keep going.