The second one does look like possibly a vintage utilitarian stoneware jar. The other two I call studio art pottery and there has been and still is today so many hobbyist that produce that type of ceramics that are sold at local artist gift shops and county fair type of venues. It's very difficult to determined who made them and even really how old they are, unless the artist signed it clearly dated it and listed their location on the piece. The nice thing about collecting studio art pottery is you can find a lot of very nice looking pieces pretty cheap at yard sales and thrift stores for a lot less than what they sold originally sold for when new. I have however bought and sold odd and unusual studio art pottery for a decent profit not knowing much at all about the item. Seems there are some who admire the funky, odd and modernist looking stuff as decor.