I’d have to say the Spy Who Shagged Me. I really like how they played with the ramifications of Austin losing his mojo. It honestly gets surprisingly deep at times.
The first 2 movies are great but I think The Spy Who Shagged Me gets a slight edge. Fat Bastard was one of the most quoted characters in my school and family for ages. That being said, Elizabeth Hurley > Heather Graham.
For me personally it’s Goldmember. Mostly because I feel like it was such a fitting end to this trilogy and thankfully it hasn’t run itself into the ground with tons of movies