emac65 I’m right in assuming you’re not from the UK?
Spesh Purgatory/Ground Control is a pretty decent most conditions setup. Doesn’t excel at anything, but reasonably quick, predictable grip in pretty much any conditions, and they’re pretty cheap.
Maxxis HR2 or Minion DHF up front would be the choice for all out grip and to hell with the compromises. Currently running a HR2 up front on my Sync, paired with a CST ouster 2.25 (basically Maxxis EXO carcass with a different tread pattern) on the back and yet to find anything that it doesn’t grip well on.
For faster rolling, check out Geax Saguaro’s. Quick but much tougher and with more edge bite than a Schwalbe Racing Ralph. Or there’s the Maxxis Ikon, which has way more grip in almost any condition than it looks like it should have, but be careful as some of the lighter versions have very thin sidewalls), and I can’t recommend them for front use unless in bone dry conditions.
If you can get hold of them, Rubena Kratos tyres have brilliant reviews, but are a bit thin on the ground in the uk.
Conti MK2’s and Trail Kings (was rubber queen) are as good as ever, but only in Black Chilli compound…
Bontrager 29-4’s (XR4 replacement) are well liked, similar to a Spesh Purgatory. I’ve got a pair of these brand new and unused I need to sell if anyone is interested…
Have heard good things about the new Michelin Wildgrip’rs in 2.25″ version, but seem to be a little thin on the ground too and I’ve no experience of them yet.
Next up for me personally will be a 2.3″ Geax Gato on the front, paired with a 2.1″ Gato on the rear for softer terrain, or a 2.2″ Saguaro for harder/drier trails. They’ll have to be good to beat the HR2 and CST ouster pairing on my Sync right now though to be fair!