Strategy Presentation Template by Simple P. is a gorgeous looking template suite that helpfully bundles a tutorial file plus Keynote versions. There’s a Korean version too, which will probably gather dust.
Particularly elegant designs are found on the Services, Features, Partners, Results, and Overview slides. The quiet balance of keylines and text hierarchies really work well. They understate data, powerfully.
The data charts continue the great art direction, but will need to be adapted to be functional with Excel content.
The pre-built colour palette is soft and subtle. It reminds of an art and design store. Your corporate colours will easily adapt here, and still provide a good effect.
Many of the Simple P. template decks utilise design elements that are not set up on the master slide, back-end of the template deck. This is very common with off-the-shelf template decks and is a regularly challenged question for clients or designers.
These templates, known as drag-and-drop, are better for novice Powerpoint users to quickly adapt. They are often too limited for corporations or for distribution across larger groups of end users.
Definitely one to take inspiration from and perhaps use the elements mentioned above within a pre-existing template suite.