If you can afford it, Honeywell PTM7950. It’s very stable and avoids pump out, which is great in a laptop where you don’t want to repaste very often. It’s a phase change material, not a standard paste. To apply, put it the fridge to cool. Afterwards, cut to size and put it on. Once it warms up, it liquefies to fill all the small gaps.

Otherwise, most other pastes are fine. I’m partial to Arctic MX-4 but they’re all pretty the similar. On direct die like a mobile chip I would recommend spreading it out to ensure even coverage as gaps can cause hotspots which may eventually damage the chip.