Varric is also…not in the same fucked up situation Oghren is. Varric has his family drama, sure, but Oghren was pretty much shat on by dwarven society, dumped by his crazy ass wife and then had to see firsthand how ruthless she’d become. And possibly kill her himself.
And while Oghren provided comic relief, his job wasn’t, ultimately, to just be fun. His story is almost as heartbreaking as Anders’, only on a much more personal scale. RPGs treat their protagonists like they can fix anything and anyone, and Oghren is proof that there are some people who are just broken. Even if you get him to an amazing place in Origins, he doesn’t truly believe he should be there. Even when he’s married to Felsi and has the respect of human soldiers, he’s too mentally screwed up to just accept that. Instead he runs to the nearest dead end he can, the one place where he can just do the thing he feels he can do right, which is kill shit, and not be expected to be a hero, or a husband, or a father or even a good person. Eventually, and with tons of effort, you can get him to a place where he’s willing to be what he can to his child, and to rise to the potential he seems to feel he has at the end of Origins, but it’s far from a happy ending.
And I love that.
So, in short, Varric is meant to be a bro through and through. Oghren can be funny, but he’s also a deceptively deep and tragic character and comparing the two on the basis of their race and their tendency to say funny stuff should really be discouraged.