I loved trying out the Pollachius texture pack. This is tested on Bedrock, pocket and Education editions of Minecraft. Working great with no Lag even on Mobile.

Pollachius is an 8x8 resource pack with a simple, boxy aesthetic and an emphasis on squares. With a grid-like and vivid look, Pollachius is enjoyable to use and adds colour to your Minecraft landscapes.

 

The Pollachius Download:

https://mcpedl.com/pollachius/