I am 6'4 and I know first hand that it takes a shit load of time to add quality, grainy muscle to the body. In a few years you will look completely different, trust me. You will look more dense and bigger. You are young, give it time.
If you want an idea of how you may look one day, in my avi I am around your age, 22 and only 244lbs at 6'4. I am now 26 and have a more 'quality' look, even though I am not that much bigger than I was back then (I am currently 262/4lbs depending on the day lol). In my gallery I have a huge close up pic of me at 255 something or other and a side tricep avi pic of me in the high 250 range. As you can see, the quality changed completely from my current avi when I was younger and not that much lighter!
It's hard, next to almost impossible to develope that muscle maturity when you gain big and gain big young

But it DOES come in time!!

In a few years you will look incredible and I wouldn't lie.
Keep at it my brother and pretty soon the quality, size, muscle maturity will all come together to form a deadly combo.
As for the lats, we are tall, what the fuck can we do about it?!?! I found out the BEST thing is rack deadlifts, underhand yates style barbell rows and just regular old pulldowns done in *strict* form, feeling the lats squeeze and contract with every pull with every rep (DO NOT do chins at your bodyweight. Once a person goes over 250lbs or so, I believe them to be too dangerous on the cuffs). Imagine them growing and spreading out wider and wider. Trust me, the mind is powerful. Trump, Arnold, Ali, Alexander the Great, etc all knew what they were talking about! And also once the maturity and quality come into place, the lats become wider when doing a front double bi and when in contest shape people focus more on the midsection than lats. So don't sweat it! Remember you can't change your genetics but you can work and work damn hard on what you got. Keep at it brother, you are young and in this sport especially when most hit their mark in the their mid 30's. Just keep going. Good luck