Maybe you want desktops? Just a thought.
I think the OP is going to see this answer repeatedly. Really their question is where can we get a laptop that gives us desktop features and desktop performance, without any explanation as to why they need a laptop.
By definition, a laptop has to compromise, for space and for weight. Both of which will impact cooling, and where cooling is limited and as they have experienced, performance has to go down. Either that or type fast to avoid burning your fingers.
There's a reason why cooling is one of the biggest costs associated with hosting servers - servers are designed to run at or near max capacity 24x7x365 in a relatively small form factor and they generate a ton of heat. In that sense, they're a bit like laptops except they can offload the cooling to the room's AC system. Also they have lots of fans and sound like you're next to a jet engine.
I see two options. Either staff switch to desktops, or use laptops with virtualization so the work is offloaded to something that is better suited to the task.