Do you have to decide this today? or do you have until spring semester 2022?
If it’s the latter, stop overthinking it. Have a multiple major has no objective advantage, so follow your genuine interests. Go, take the courses you are interested in and see where they take you. Maybe you get there and fall in love with the P or P or L or H or C department, and decide to major in (gasp!) just one of them, and just take the specific courses that you want to take from the others.
IRL you are likely to have 2 years of work experience between finishing UG & starting law school- often at a law firm- and tbh that is the best prep for law school.