Other options would include:
1. Burls - for custom ti
2. Any number of builders to do something in 631 steel
for off the peg
1. condor cycles - fratello may float your boat
2. thorn audax
3. Pearson have a couple
4. specialized tricross
But I concur with the above, you can do everything with one bike, however, it will not feel as alive as a lightweight road bike, maybe comprised by heavier luggage. It just depends what you want to feel when you ride it.
1. Burls - for custom ti
2. Any number of builders to do something in 631 steel
for off the peg
1. condor cycles - fratello may float your boat
2. thorn audax
3. Pearson have a couple
4. specialized tricross
But I concur with the above, you can do everything with one bike, however, it will not feel as alive as a lightweight road bike, maybe comprised by heavier luggage. It just depends what you want to feel when you ride it.