Jughead and Betty from Archie Comics are sometimes this, Depending on the Writer. Most of the time, their closest relationships are said to be with people besides each other, but you wouldn't think so from reading a lot of the earlier stories. Their relationship rarely quite reaches Platonic Life-Partners in later years, although there are still moments of this. So far, none of the futuristic stories have shown them hooking up, but at one point in Life With Archie: The Married Life, a returning-to-town Betty says that Jughead was the one she missed the most.
Modesty Blaise and Willie Garvin in the long-running Modesty Blaise adventure comic strip. As explained many times in the strip, this is due to them sharing a bond that's stronger than love. See the literature section for additional information.
Dwight from Sin City is normally Mr. Fanservice for women in-universe, but Miho does not seem to be in love with him. It doesn't stop ShippingFan Fics, however.
Paperinik from Paperinik New Adventures has several, most notably Lyla Lay and Xadhoom. While Paperinik does have a girlfriend who doesn't appear in this comic, he is very close to both and has no problem acting affectionate, going to pseudo-romantic dinner dates with Lyla and refering to him and Xadhoom fighting side by side as dancing.
