Members of the fellowship of the Ring :
1. Gandalf
2. Aragorn
3. Legolas
4. Gimli
5. Boromir
6.1 Frodo (*)
6.2 Sam
6.3 Merry
6.4 Pippin
*Since Hobbits are a quarter of a man, so 4 Hobbits = 1 man.
Party of 4 is heresy to fantasy genre. Fix it!
Of course, a third of the way through the campaign, the party sizes were 2 (Frodo and Sam), and 5 (Aragorn, Legolas, Gimli, Merry, and Pippin). That makes an average party size of of 3.5, which can usefully be rounded up to 4....