One thing:
3-4 bowel movements can be very normal. Actually in our constipated world we are so used to maximum one bowel movement per day,
that we forget, that each meal actually should come out as a seperate bowel movement. If you eat 3 meals per day = 3 bowel movements per day would actually be the goal! If you eat 4 times = 4 bowel movements per day.
The consistency of dry but glistening peanut butter I don't quite understand, but doesn't sound too bad either since not gushing liquid.
There are a stool charts and anything soft long 'sausage' like or maximum sausage with bit grape/cracks structure is also the stool consistency to go for.
Please look up Bristol stool chart and compare.
Any 'corn on cob' (pebbles pressed in sausage) style is too hard actually.
Why is your condition called 'diarrhae' if it is not loose stools and more than 5 times? Because it is more than 3 times sometimes?
Even 4 times a formed stool per day is not diarrhae.
Also you got your stool tested for parasites, that's good.
Do you feel ok or do you have other symptoms?
You might want to take daily probiotics
and
introduce a bit of additional soluble fiber (husks, bran), be careful though, soluble fibre needs lots of fluids otherwise can actually constipate or obstruct (hence I love my less dangerous insoluble fibre via green veggies much more)
Maybe you are malabsorbing some foods (sugars) like fructose or lactose that give you a bloated feeling and more stool frequency, that you don't like.
Have you tried elemination diets? FODMAP? Breath tests for fructose, sorbitol, lactose?
All the best!