Roland's System-8 keyboard is all the synths you want in one case
 

There's a reason professional keyboards and synths are filled with dials, buttons and levers. When a musician is getting ready for the next song, it's quicker to turn a knob then sift through multiple sub-menus via the onboard computer. Roland's Syst...

https://www.engadget.com/2016/11/08/...stem-8-review/