Stevens Traditional 64x is a HD default texture pack which was created at the time when faithful HD was also created. As a result, this pack has not received such fame and waves of hype in Minecraft PE, but now...

Mizuno's pack has detailed textures with muted tones and detailed elements that creates a good impression of the gameplay in Minecraft PE.

OzoCraft Texture is a graphical add-on for Minecraft PE in medieval style with a resolution of 32×32! It is important to note that this texture pack is quite dark tones of colors, and many units become a "village".

SDGPE Shader is one of the most realistic shaders available for Minecraft: Bedrock Edition.

This is the best home decoration texture pack for your Minecraft PE. It has a little cartoon style and a pretty high 32x32 extension, which is twice the standard.

Lightweight Shaders will make the world of Minecraft Bedrock Edition more realistic. Shaders can seem too bright in the daytime, but it can be controlled by the settings in Minecraft PE. However, the brightness in night time is very well balanced.
Update for 1.19.x

These are brand new ESBE 2G 1.20-1.19.83 shaders for Minecraft PE, with this you will have more realism for the environment, such as waves of water, rounded shadows, realistic glare and rays of the sun...

FireWolf is a 128x resolution resource pack for Minecraft PE. Textures are very smooth and bright, very pleasing to the eye.

Meet the full alternative vanilla Minecraft PE resource pack with built-in shaders that work on iOS and Android. These textures have an extension of 16x16, but they are much better...

Meet the new realistic texture pack which is created in order to improve the standard content in Minecraft PE. This pack is a direct competitor to Faithful HD, because all the default blocks and mobs will not be changed very much...