I'm not sure I played enough major RPG releases to write a ranked list without omitting several contenders, so I'm going to sort my favorite RPGs of the year by arbitrary categories instead. Here goes.
The Legend of Heroes: Trails in the Sky the 3rd
The Legend of Zelda: Breath of the Wild
Night in the Woods
Tales of Berseria
Xenoblade Chronicles 2
Ys VIII: The Lacrimosa of Dana
Those are the seven (!) RPGs and adventure games I most regret not playing in 2017, and as such aren't represented below. I own a few of them, and they're right at the top of my backlog; I may wait for that updated localization for Ys before getting to that one.
Danganronpa V3 isn't my favorite game in the series, and maybe isn't even the best visual novel of the year. Regardless, Danganronpa's entertaining murder mystery plot has a few crazy turns that left me awestruck, in particular the outcomes of case 1, case 4, and the grand finale. I'm not sure if they SHOULD do any more Danganronpa games after V3. That ending. Wow.
Pyre is the combination of Oregon Trail and NBA Jam that I never knew I always needed, and it blends its basketball minigame with a story that is both fascinating and frustrating. To get a good story conclusion for your favorite characters, you often have to grant them permission to leave your party or even lose Rites on purpose. I know that Pyre is a game I'll want to replay, just to try and hit different story branches and team up with new characters in its diverse cast.
Tekken 7 might be the most complete fighting game experience ever made: stunning visuals, smooth controls, intense action, excellent online features, vast customization options, completely bonkers cutscenes (and story mode), two bears, three robots, and three excellent guest characters. Tekken 7 is a must-play for fans of fighting games and my favorite fighter since Persona 4 Arena.
If I awarded prizes for Best Music, Most Stylish, or Best Cast of Characters, all three would go to Persona 5. P5 is the best realization of Persona's gimmicks of living as a Japanese high school student, balancing social life with dungeon combat, and facing an opponent who represents a twisted interpretation of human desires. Persona 5 refines the mechanics and visual flair of Persona 3 and 4 to a razor-sharp point, and I found it the most entertaining and satisfying game of 2017.