Get sized properly, but also have a very solid think about what you’re wanting to do, what your budget is and what your potential future holds.
If you’re between sizes then you will be able to make either fit, but one will potentially be more “comfortable” while another slightly “faster” (“slightly” being a strong word in both cases)…
I took a full year over deciding what bike I wanted with my last purchase and I’m really glad I did, it’s working out perfectly.
I won’t name it as that’s pointless, it’s a very personal decision. I would suggest, however, trying to make sure you get a bike with decent tyre clearance (which plenty offer these days) as it offers more options down the line.
I wanted a good proxy for the “One bike garage” approach, so picked up a very aggressively positioned “gravel” bike. I ride it out with both a road cycling group on very fast group rides and also a mountain-biking group on serious (for East of England) off-road trails and it sits with the more “specialised” bikes in both groups. At the same time, it doesn’t quite match the road bikes in flat-out sprints (different tyres would help) but only at absolute max efforts, and it’s not as comfortable as an MTB off-road (but more enjoyable in my, very personal, opinion).
Ribble are good bikes and they can meet your requirements or mine as above, but as any good “independent” channel would say “Other brands and models are available”.
Have a good shop around, aside from a stock issue, the bike market is fantastic at the moment with completely specialised bikes to suit any single riding style and some amazing “do-it-all” bikes that will do everything except maybe win an Elite classification event (but I would argue that right up to the very top level you (and I) are more of an impediment than a good “do-it-all” bike)