Common plastics tier list, from a guy who basically doesn't know what he's talking about:

S tier:

• Polyethylene (HDPE, LDPE): Fucking excellent. I am pretty confident that polyethylene is just totally safe; I don't mind that it's used all over the place. You can basically look at the chemical structure and go "yep, seems obviously fine."

A tier:

• Silicone (polysiloxane): Sliiightly less trustworthy than polyethylene, biochemically speaking. But very very useful, and nowhere near as scary as later entries.

B tier:

• Nylon: Pretty cool plastic for fabrics. Strong, not a huge amount of health concerns, though it's hard to say for sure.

C tier:

• PTFE (Teflon): Extremely useful as a dry lubricant / non-stick coating, e.g. in non-stick pans. Unfortunately this might mean that it's especially likely to accumulate in you, since probably most of the food you eat was in contact with PTFE while cooking; worse, PTFE decomposes into less-stable things at plausible cooking temperatures. Vaguely recommend avoiding.

D tier:

• Polyester (e.g. PET, but others also). It is hard to avoid polyester in clothing and bedding, which kinda sucks because it probably lets off a bunch of endocrine disruptors during regular use.

F tier:

• Things with BPA in them: idk man, I would prefer if my food storage plastics (e.g. aluminum can linings) didn't basically act like a constant low-level estrogen supplement.
• PFASs (other than PTFE): This is a big category and other than PTFE there's no obvious single PFAS to call out and research, but the whole situation with them seems sketchy to me.