Brown. Dogged, not populist. Good balance of fiscal and social accumen. We could have come off far worse in the 2008-10 crash than we did without him taking decisive action that wasn't far different to Rishi's. While we could argue his role as Chancellor in the preceding years, it was a global crash and he was not responsible for similar processes occuring through the world's major economies.
May, I'd give the benefit of the doubt. Strong willed and determined again which was her demise with Brexit as her path pleased neither side. I think this situation would suit her better. She has integrity, and while I don't necessarily agree with her politics, I can respect her. Has a strong work ethic and is a committed politician rather than driven entirely by ego and status.
Blair, generally competant but possibly swayable by populism. Happy to throw money at social problems.
Major not sure. Another awkward second (+) term prime minister who succeded as much by undesirable opposition as their merits. Did survive a recession cycle and left the country on a secure footing in 1997. Tends to speak good reason when he does pop out of the woodwork.
Thatcher, strong, decisive... depends on the outcome you want... prepared to take harsh decisions for long term gains to the majority. Prioritises the economy. Was clearly prepared to implement the pain of cutting off heavy industries/ mining with limited futures in a global economy (and I have worked in those communities where the effects are still felt decades later) however, I'm not sure if that would transfer to letting long term viable industries collapse due to temporary impediments. Was also behind initiatives such as Enterprise Zones that repurposed areas such as the Docklands with new service/financial industries. Again while economically for the greater good, gentrification marginalised and drove out established communities. While she would want vulnerable sectors to survive, I'm not sure that she would support at an individual social level to get through this and would be more inclined to put in investment at the tail end to support business restarting.
David Cameron. Definitely bottom of the list. Unleashed the hell of Brexit and ran. Austerity. Neither brilliant in economy, socially, or integrity.