Singular Swift. EBB for ss, it also gives a nice stiff bb area for uphill. Or run it geared, alfine etc. Long chainstays and big tyre clearances. Run mine 100 sids or rigid. Front triangle not small, so you can get a frame bag and two water bottles in. On a Brooks, holding Geoff bars with sids, mudhuggers, and light wheels and tyres its comfy and fast and dry cross country. If you want to try something different alfine/ 29+ front etc its flexible to whims.
I’d like to try a Sherpa, Jones or Ritchey P29 though…a Pegasus would be lovely in titanium. Prob 68-69 ha is about optimum compromise for xc all day and keeping it still engaging going along.
New Swifts due this year. For throwing a bike over a gate though, a carbon frame and fork is much better throw. That oo whippet would be ace geared.
For true xc all day, from uphill steep offroad to onroad you cant gear a ss for thst range without suffering at one end. Gears make a better day out if you’re including road sections or you’ll be going slow.