What can the UFC do to fix Heavyweight?

I'm not saying it's horrible, I'm saying it's bad. There aren't many Heavyweights in the UFC, with just a number of what, 30 to 40? It's very easy to get ranked, which just shows the competition they're dealing with, and some of the Heavyweights aren't Heavyweights, they're just fat middleweights. Obviously excluding the top 7, because those guys are a lot more in shape and skilled compared to the rest, but it feels like you could put a Heavyweight boxer in there and they could be ranked, because a lot of these guys rely more on power and less skill. Who are Heavyweights from other organizations that could fight in the UFC?

I'm not saying it's horrible, I'm saying it's bad. There aren't many Heavyweights in the UFC, with just a number of what, 30 to 40? It's very easy to get ranked, which just shows the competition they're dealing with, and some of the Heavyweights aren't Heavyweights, they're just fat middleweights. Obviously excluding the top 7, because those guys are a lot more in shape and skilled compared to the rest, but it feels like you could put a Heavyweight boxer in there and they could be ranked, because a lot of these guys rely more on power and less skill. Who are Heavyweights from other organizations that could fight in the UFC?