For dough, if we’re not talking commercial Hobart, there is Ankarsrum and there is everything else.
https://www.ankarsrum.com/us/
It depends on your needs. I purchased an Electrolux (now Ankarsrum) almost 20 years ago. I had four kids at home. I made all our bread. I would make three large loaves at a time, each one taking 20 ozs. of flour. Add in the hydration for the type of bread and well, you do the math. It was a lot of dough. This was the main reason I bought the mixer, and I never regretted it.
However, the mixer was not as versatile as was marketed. It worked, but I found myself wishing I had a big 'ol Kitchen Aid for a lot of pedestrian cooking chores, but of course I was not about to have two big mixers. Some people actually did, though. For large amounts of bread dough and cookie dough, it was in a class by itself. I would encourage anyone with these kinds of needs or desires to get one.
Now it is the wife and myself. All of my bread is stretch and fold. The amounts that are not could be easily done with a Kitchen Aid (and yes, I would definitely get the biggest "pro" model, whatever that is now). Most of the attachments are great, except for the meat grinder. The grinder is junk. Yes, I had one on an old pro Kitchen Aid I got back in the mid 90s. I made a lot of sub-par sausage until I became more educated and found what a quality grinder can do.
Anyway, what I am saying is that I would agree with Dan, but only in a certain context.
Cakes? I am at the point now where I would not use a mixer at all. I am a much bigger fan of getting a quality, heavy dough whisk. Cakes and quick breads should not be beaten or over mixed (my opinion). Whipping up the frosting? Hand mixer or wand, depending on density. No you definitely do not need a mixer in my opinion. Going strictly by your original post, I would recommend a heavy whisk (yes, I have one and use it all the time for things like this). Frosting? It depends on the amount and density. You don't
need it, but I'll always take the machine if it can do in five minutes (and do it well) what would take me 15 or 20 by hand. Whipped cream type of stuff? Wand or hand mixer.
My 2 cents.