The problem is to find someone honest enough to look credible doing it.
It might me counter intuitive, but I prefer Mueller to remain in place. His investigation and reputation are tainted. Any subsequent findings are fruits of the poison tree. Another IC would start this thing all over again and prolong this charade.
Hopefully the impending FBI IG report will show additional wrongdoings and further taint any findings.
The House of Representatives can impeach them.