This question would probably better fit in the Unoa Elder brother thread. If I remember correctly, we discussed alternate bodies too. I use the early Dream Valley 50cm body and (I think) IOS Body. It's a bit shorter then the Dream valley body but more buff.
Huajing 1/4 bodies work well proportionally and their tan matches paradise skin quite okay. Unoa tan is a little darker but not overly noticeably so. The only little ick is maybe that the neck is a tad wider and might need sanding. Spoiler: naked doll
I assume the same companies as for girls as long as the neck circumference is similar? The headbacks are the same for both boys and girls. Fairyland and DF-H's tans seem to match, huajing is a tad lighter but still doable.