Men's fashion is actually a pretty huge industry. A growing one, at that. It's not as if there aren't specific stores devoted solely to men's clothing either. Yet putting all that aside, FFXIV isn't afraid to draw inspiration from various different real world cultures. There's ample pieces of cultural and historical attire to tap into when it comes to stuff that looks cool and masculine on a male model. A male counterpart to Edda's dress, for instance, could have easily have been some sort of pseudo Victorian/Gothic attire. Think the sort of outfits worn by characters in games such as Bloodborne.

Simply unlocking a lot of the outfits used exclusively by NPC's would be a good start. Especially since Yoshi-P has expressed a desire to appeal to role-players. I'm not talking about major NPC's, either - but rather the likes of the Ishgardian and Hingan civilians wearing fancy looking attire that is not currently available to players. People have actually been asking for this for years, though...so I won't hold my breath.

Then there's things like Hien's outfit to consider. Most people requesting it on this forum were specifically after the hairstyle as well. Though that wasn't added - even though it could have been a neat looking unisex hairstyle.