For me
Mint
Manjaro
Zorin
Garuda
Neon
Gentoo is a metadistro - a set of tools to build your own distro. LFS is a documentation to build your own Linux system. And if one chooses to install some package manager and configure a repo for it, it basically becomes a distro. LFS can become Gentoo if you choose to install Portage and use Gentoo repository.
Setting Gentoo up seems to be quite simpler option compared to LFS. Sure LFS might teach you even more than Gentoo.