I would consider Marry Grave to be a modern day Rave Master or Fairy Tail, with a more romantic twist instead of the usual 'friendship is magic' trope. While manga like Black Clover may be taking the spotlight as a 'shounen successor', I really think that Marry Grave is much more deserving in that regard.
What makes it so much better is that, unlike so many other fantasy-setting manga, it presents the reader with a realistic end goal right off the bat; to reunite Sawyer with his lost wife Rosalie. The set up is so simple, but with the pairing of likable characters and interesting events it makes you want to root for the protagonist to see his goals turn to reality. Maybe I'm just a sucker for a good love story, but it's so much more satisfying to see two characters finally come together rather than to see one character just become the strongest or something along those lines.
In this age of dominance by isekai and fan-service, it's very rare to find a manga with so much potential to be a great shounen classic. I have to say, it's a shame this manga was cut short when it definitely could have run for another 100 to 200 chapters and retained the same energy that it captures the readers with in it's initial chapters.
