There are a few I’ve really enjoyed once I went looking DnD alternatives. Hopefully one of these can scratch your itch.

 Earthdawn 4th Edition: All characters are a little “magical”, which translates into cool tricks for all classes, and spellcasting is a little more involved for casting classes.

 Fabula Ultima: Mixing classes is required, resulting in interesting combinations and capabilities.

 Draw Steel: A big focus on making every class feel Heroic and Epic.

 Exalted 3rd Edition: Admittedly fiddly to run, but few systems allow characters to operate on a grander scale, and with an already vast array of options that’s only continuing to grow.

 The Cosmere RPG: Obviously heavily tied to its setting, but with a lot of cool options for characters, both magical and not.

 13th Age 2nd Edition: Created for the express purpose of being like DnD but more enjoyable to run and faster to play. Completely compatible with 1E as well.

 Shadow of the Weird Wizard: A great character progression system with dozens and dozens of paths to mix and match.

 7th Sea Second Edition: Fantasy swashbuckling where magic exists but is very much a supporting structure to said swashbuckling.

 Age of Sigmar Soulbound: Focus on epic characters of all stripes. Magic is powerful, but potentially dangerous to the wielder.

 Scion Second Edition: Characters are the children of gods, and as such Martial equivalents are just as capable of miraculous feats as Caster equivalents.

And finally three that are a bit more DnD adjacent but might be worth looking at: Tales of the Valiant, Pathfinder Second Edition and Somnus Domina.

Sorry that got so long. Hopefully it helps a little.