Are you basing your opinion of Jaco on one Utube clip? I'm not sure when it was filmed but he did suffer enormously from the effects of overindulgence in mainly coke and alcohol. Even given that I still think it's brilliant.
To see the significance of the man you need to go back and listen to accounts of other musicians who were around when maybe a camera or recorder wasn't. Make yourself aware of his raw and vibrant energy. Listen to what he was recording with Weather Report and before, and then step back and ask what else was going on bass wise at that time.
I'm sorry but imo he's unique, whether or not you like his stuff. He did things with a bass that hadn't even been dreamnt of before and we all celebrate his legacy today. A true innovator. He also played a groove like no other too.
At least that's what I firmly believe.
I do love jazz mind