No. Zsh. It's pretty easy to have a nice auto compl. No need for omz. After knowing poweline10k I just use it and syntax highlight plugin, manually installed. There is no need to add entire omz.
If you need to run a set of commands or a script with fish you can just toss them in a file and run bash file.sh. I have been daily driving fish for years and I don't even have think about it.
I personally like xonsh despite the minor amount of wonkiness it has, it's so nice to have python available directly in your shell, it takes the "i don't care about the quality of my code i just want this shit to work with minimal effort"-ness of bash and turns it up to 13.