“The secret of the tuxedo, Magnus knew from many decades of experience, was that every man looked good in a tuxedo. If you were already a very attractive man, like Alec, you would look very, very good in a tuxedo.”
How about crime family Lightwood and current head of the organization Alec, who meets Magnus in a completely normal place (coffee shop, book store, Park,..) and the two of them are smitten right away and start a relationship.
The longer it goes on, the more Alec agnoizes over how to break it to his wonderful boyfriend that he is basically the head of the mafia.
Then one day the unthinkable happens and one of Alec's enemies gets their hands on Magnus.
When Alec and his Team find the location where Magnus is being held, they storm in, guns ablazing, and all…
only to find Magnus standing in the middle of lots of corpses, a bloody knife in hand, and upon seeing Alec he goes
"So, look, I was going to tell you, but how exactly do you bring up 'I'm a semi retired assassin' over dinner?"
sometimes I remember that Magnus Bane literally appeared in every single book of the shadowhunter chronicles and no, I'm not talking about trilogies, I mean every book (it's subtle, but we can find him also in the codex) and I just realized how he really is the supreme main character of all time