The real easy alternate solution for 80% of bosses is just a greatshield + rapier. You can simply poke while blocking. Due to the way poise works, this also tends to cause a fuckton of staggers because hitting the enemy while they attack makes it much easier to avoid having their poise meter decay.
How well do great shields work for blocking in wombo combo land of Elden ring? In previous games your stamina wouldn't stick it out and they would poise break you and rape your butthole for it. I've always been a shield user and as soon as a boss appears it's time to stop blocking til they're dead.
Like I said, it works for maybe 80% of bosses, assuming you've got a good shield and decent stamina bar. There are still attacks that crush through blocks or contiually wear them down, but a lot of otherwise chaotic fights like ulcerated tree spirits or rune bears become completely trivial, and it's easier to learn the timing to dodge roll one or two unblockable attacks (fucking grabs!) than it is to learn all of them. The real benefit is how aggressive it lets you be; I can stand in front of an enemy while it's whiffing some big attack combo over my shoulder and poke away. If it happens to hit me I maybe stop poking or try rolling away, but I probably don't even take damage. A lot of time even if you get stance broken you'll be fine because the follow-up was meant to roll catch so you have enough time to block again. The most troublesome enemies tend to be ones that like to keep their distance and move around a ton. Don't bother trying to block vs Maleketh or Malenia.
The problem is, it's fucking boring. You can't even really use ashes of war this way, or get any variety in your attacks. Just poke poke poke. I had way more fun trying to use fancy spells or weapon arts. It's stupidly effective though, especially if you use something like the antspur with a bleed infusion (you can rot fucking anything in this game, even radagon), or one of the giant rapiers that inflict a surprising amount of stagger.