Yeah, heteronormativity in BL is erm, a choice.

Yebles:
Is there a BL where both leads are tall, confident and strong.
Does this mean you're looking for stereotypically, traditionally masculine male leads? I can't add anything new that way, but these are some where the male leads are essentially equal and mutually supportive.
Looks like this is a new account - peeked in to see if I could get a sense of what you've been watching for comparison. The only title on it I'm familiar with at all is Depth of Field, and I dropped that mid-way because it felt like it was going to be abusive behaviours solved through the miracle of love and music, and that's an aspect of het-coding I'm especially allergic to.
If you have GagaOOLala - look for movies. The gay is more likely be gay rather than BL gay.
A Boss and a Babe - both tall, both physically strong. Boss-intern but the dynamics of that are subverted by the intern having less than zero interest in an office job. Instead he's an irrepressible force of nature. They're both confident in many respects but also have pain & vulnerability.
See Your Love - some height difference, but the shorter one is stronger physically. Both strong personalities in different ways. Great comedic use of tropes to add energy and shorthand a lot of plot, including bad guys it refuses to take seriously,
Bokura no Shokutaku (Our Dining Table) - very similar physically, both are emotionally vulnerable and lacking in confidence for different reasons, and help each other through that. Assisted by the World's Cutest Kid and Most Adorable Wingman, who adds plenty of energy while the older ones figure things out.
I Hear the Sunspot - height difference but the shorter one has a BIG personality and a loud voice. He takes up at least as much space because of that =D
How about something like He's Coming to Me? There is quite a height difference but it doesn't have het-coded dynamics (director Aof is gay). Also much of the series is their friendship rather than overt romance. They're both confident, in different ways, and also vulnerable.
Some of these might not suit you in this particular moment but they'll all be good for staying away from the frail-coding used to tell teenage girls which boy to project themselves onto that you're understandably fed up with.