In 90s point-and-click adventures, the pixel-hunting and brute forcing of interaction combinations is a ubiquitous hallmark. What were the most intuitive adventure games vs. the most obtuse and arcane of that era?

I played Full Throttle and some of the Humongous Entertainment games as a kid. As an adult and well into the late 2010s, I played Monkey Island, Grim Fandango, Dreamfall, and Sam and Max, Syberia, as well as a lot of independent titles in the modern era (like Tim Schafer's Broken Age), and the Myst and Riven remakes.

Modern adventure games sometimes highlight interactibles or offer hints.

But of the vintage ones, what do you consider to be the most 'I could figure this out without spamming or using a walkthrough'?

I am playing Gabriel Knight 1 at the moment. I feel like some things I could figure out, or I know in theory what I have to do but just missed something by a pixel.

But there have been a few puzzles (I'm on the final day) that I never would have figured out without a guide, like the tomb message.

Which got me thinking: what game of that era had, whilst still being challenging, the most solvable and intuitive puzzles? What would be all but impossible without a guide?