The starters are actually pretty damn good though! Incineroar especially comes to mind, with its wallbreaking signature move, slow u-turns, access to leech life, high bulk made even better by its hidden ability Intimidate, and a decent-ish typing that renders it only weak to Rock, Ground, Water and Fighting. It's quite versatile; it can do an assault vest setup with Intimidate and base 95/90/90 defenses, which are quite good, especially when buffed by Assault Vest and Intimidate, making it bulky as all hell, plus still able to heal using Leech Life!
It can do some crazy Life Orb stuff, it can do defensive builds reasonably well, it can act as a wallbreaker.
Its offenses are fairly decent too; 115 Attack and 90 Spatk are pretty good, you can even run a mixed or special set with Incineroar as it has access to Nasty Plot, or patch up its speed with Flame Charge.
It's horrendously slow at 60 base speed, but then this generation is as a whole, it would seem.
Primarina is good, though not as good. Decent typing, counterpart to Azumarill, but special; though nowhere near as much offensive power. It can do special tanking too, though its defense is kinda low (74) vs 116 sp.def.
Like Incineroar, Primarina is slow as shit. 60 base speed. It also can't last as long as the heel cat, as it lacks access to recovery options.
Decidueye can function as a spinblocker and pivot quite well. Its stats are balanced, with 78/75/100 defenses and 107/100/70 offenses. It is faster than the other two starters, but not by much, at base 70 speed. It has access to reliable recovery in Roost, naturally gets U-Turn, and access to hazard removal in Defog. It has also got just barely high enough stats to function as a sweeper too, with access to Sucker Punch, Leaf Blade and Swords Dance. It can also, like Incineroar, run a mixed or a special set as it has access to Nasty Plot, though it has far less coverage options on the special side.
It can even stall semi reliably, with defenses comparable to Zapdos (90/85/90), resistance to Electric vs Zapdos' neutrality to it, and both having access to Roost.