This page allows you to explore the molecular orbitals of benzene arising from an ab initio calculation. The first 6 MOs arise from very, very, weak interactions among the carbon 1s orbitals. The HOMO, LUMO and pi MOs are identified. There is a total of 36 MOs, although only a few around the HOMO/LUMO interface are of chemical interest.
(works only with wireframe orbitals)