I'm not the biggest, nor the strongest, but all of the weight and strength I've gained was gained as a vegan.
I started lifting around the same time I went vegan. I went from 70-ish kg to 110 kg in four years. My body fat has remained about the same, if not reduced, although I can only judge by how I look & feel.
Yes, Sosso, you certainly are a shining example of what can be accomplished with smart, heavy lifting and plenty of food! The progress you made over the last few years has been awesome, it's tough to envision you actually being the same guy in those original photos you posted where you were so much smaller. Definitely been one of my favorite people to follow for progress over the last few years!