I was running a Specialized Butcher front and Slaughter rear but found them to be a false economy as they buckle too easily and often just taking them on and off for repairs. Great performance though especially the Butcher. I did find the Slaughter spinning out on wet steps etc during the winter.
Now running Mavic Charge and Quest XL pro at 2.4 wide. The Quest is great as a rear tyre, a lot like the Slaughter but with the extra grip down the middle to stop it spinning out. I am finding they wear out quickly. The Charge is OK but not as good as the Butcher and needs to be run at lower PSi’s otherwise it’s too narrow on it’s grip and can slip from under you.
The Butcher up front and the Quest at the rear would be a great combo, but without the false economy and wear issues.
Looking at the Maxxis Aggressor next as a rear tyre. Mate has it and it looks like it might fit the bill.