Dragon Slayers is the game I *wish* I played back in high school. All of the character classes you expect in a high-fantasy dungeon crawling RPG of any sort are here - and they are all different, interesting, and dynamic. There have been times when I've read a ttrpg and thought "oh yeah, I'm excited to play this particular class/playbook/archetype" etc. - but with Dragon Slayers I felt that way about EVERY one of the character options.
It is laser focused, quick to learn, easy to understand, and full of fun and relevant options. Monsters are thematic without needing long wordy entries. Each of the Dragon "boss" monsters featured is wildly different and all look like a blast to run or to fight.
I'll just say how I really feel here: if you are playing D&D right now, you probably want to play Dragon Slayers instead - you just don't know it yet.