The fermions are particles with mass, an electron is already a fundamental fermion and not made up of quarks like protons and neutrons. The fundamental bosons (as far as I know) are particles that “handle” the interactions between other particles for instance gluons enable the strong force, while W and Z Bosons enable the weak force.
I believe the fundamental Higgs boson does occur in nature but likely immediately decays. (if I’m wrong I’d love to know how it actually enables certain interactions in nature)
Also I’m not studying quantum physics so I wouldn’t be surprised if someone needs to correct me. :)
Edit: clarified when fundamental fermions/bosons were meant.