Bodhi, Peppermint and LXLE are all based on Ubuntu but use either LXDE, LXDE with elements of XFCE or (in Bodhi's case) the Moksha desktop, which is a fork of Enlightenment 17 - it's smaller and faster than LXDE.

Otherwise, go with a Debian or Devuan based distro like antiX, MX Linux, Q4OS Trinity, Refracta or EXE Linux.