Micah Sweet
Level Up & OSR Enthusiast
Ok, here's my ranking off the top of my head:5e doesn't make my top 5 even when I limit it to "games that are like D&D." And it's my second favorite edition!
D&D 5e itself (the official game) comes after (in no particular order) the Without Number series, ACKS, Level Up, DCC, 1e, 2e, B/X, BECMI, Cyberpunk 2020, TSR Marvel Superheroes, 7th Sea 1e, Classic Deadlands, and every AEG edition of Legend of the Five Rings. It's on par with 3e/3.5, just above Pathfinder 1e and Mutant & Masterminds, and well above Palladium and those PBtA games I've played.
So like #18 or so? Of course, D&D 5e is far more popular than any of those.