You might want to check out @startrekreviews. They haven’t covered every Star Trek book, but they’ve done a decent-sized chunk of them, and they itemize things which readers may find appealing/offensive. So this may help you drill down what you’re looking for, since the books themselves only hint at their content by the back cover synopsis and the characters depicted on the front.
I read a ton of TNG in high school, then I got sick of them once the novelty wore off. It seemed like a bunch of them kept using the trope of an away team getting stranded on a hostile planet while the Enterprise dealt with some B-plot. You’d probably want to avoid these, since they’re pretty Riker-heavy. Either he’s leading the away mission and roughing it without the ship to back him up, or he’s up on the ship brooding about how he shouldn’t have let Picard lead the away mission this time. Either scenario is a pain in the ass.
The two I would recommend are:
Metamorphosis by Jean Lorrah. Put simply, Data gets transmuted into a human. Worth checking out if you like Data and you want to see how that would go for him.
Vendetta by Peter David. This one’s about the Borg coming back after “Best of Both Worlds”, which was kind of a big deal at the time because “I, Borg” and “Star Trek: First Contact” were still a long ways off. It’s PAD, but it mostly focuses on Picard, Guinan, and Geordi, as I recall, and it’s a much different theme than what you get from Imzadi. On the other hand, this was one of the first TNG novels I ever read, maybe the first, so it probably isn’t as mind-blowing as I remember. Anyway, fourteen-year-old me thought it was pretty good, for whatever that’s worth.