Yoshi Kirishima
Smash Lord
Because she has enough strengths to still be interesting. She's not a heavy but heavies also don't have a buckler that gives invincibility, allowing her to beat out options with attacks that you normally won't be able to do.
Her smashes are have endlag but are pretty fast and are strong like heavy's smashes, and have interesting properies like the wind effect and downsmash hitting both sides (as well as a decent close-up anti-air) and upsmash just hitting super high and setting a small lingering wall.
(In the shield attack grab rock paper scissors game, her buckler cheats by beating two out of 3 options compared to a normal attack which will normally only beat one out of 3. Thus her buckler has double the utility in this sense).
Etc.
Her smashes are have endlag but are pretty fast and are strong like heavy's smashes, and have interesting properies like the wind effect and downsmash hitting both sides (as well as a decent close-up anti-air) and upsmash just hitting super high and setting a small lingering wall.
(In the shield attack grab rock paper scissors game, her buckler cheats by beating two out of 3 options compared to a normal attack which will normally only beat one out of 3. Thus her buckler has double the utility in this sense).
Etc.