I know that hard drive boards that are not SATA supposedly fall into the non-SATA hard drive board category, however, I have some really old hard drive boards out of a large 8 inch hard drive. I've posted pictures of the three main boards that came out of these hard drives. Since they look very different from IDE or even MFM, I'm not sure if they'll end up being classified as non-SATA and instead end up maybe high telco (aside from the smaller board which may be low telco)? Anyone else have thoughts on what I should categorize these as?

They are non-SATA hard drive boards, you had it right. No need to over analyze, you will get more for them in this category anyway compared to telecom even if that was the case.
The way to look at it is they are trying to segregate the SATA boards, as they are worth less these days than prior iterations. So, really any other logic board you pull from a hard drive, as long as it isn't SATA will fall in the non-SATA category.