If I was comparing those films to each other, I would probably put Ragnarok first, Civil War and Black Panther tied for second, and Doc Strange last in that list. But I really enjoyed Dr. Strange, so it's just a matter of degree here.I definitely think it's as good as CW. But CW felt like a mess to me. It's gotten better with repeated viewings, but I definitely left the theater disappointed. Doctor strange was forgettable for sure. But Ragnarok was pretty great, even if it poured on the humor thicker than I would've liked. But it was a really enjoyable film. I'd rank it higher than BP.
As far as suspense? I don't think there was really much of that. Maybe if T'Challa was DOA for longer and we saw more horrible things under Killmonger in the meantime (which is why I still feel like the Killmonger storyline deserved it's own movie apart from the origin story).
Ragnarok was the most fun, and was a compelling story, for me, beyond those other films. Civil War had some really great moments, Spidey's intro was fantastic, it was great seeing Giant Man. The fighting scenes in that one are hard to beat. But it loses points because the climax didn't make any sense and Zemo was more or less wasted (I'm holding out hope that he can be redeemed in another film!). Black Panther was solid across the board, with great actors, great fights, and possibly the best villain so far in the MCU. But the terrible, inexcusable CG took me out of the movie, and colors my overall perceptions. Plus, there are logical inconsistencies that bug me (every film has those, but some of the ones in this movie stick in my craw). Doc Strange was also a solid movie, with an interesting character. But he suffers from Marvel's approach, where every other character seems to be a genius (Stark, Banner, Pym, Parker, Arnim Zola, T'Challa's sister, Howard Stark, Selvig, Rocket Raccoon). In that context, what's one more genius who happens to learn magic powers?