For 26" wheels these come in a range of sizes, although particular variants are getting harder to purchase as the 26" rim goes the way of the dodo.
Nobby Nic 2.35
This is an excellent front tyre. Large volume and lightweight combined with great traction make this my favourite:
Nobby Nic 2.25
There's clearly a lot of manufacturing variation in these tyres. This version features the Addix compound and although smaller than the 2.35 weighs more: