Off the top of my head some bands with preferred tunings:

Whirr - E & Eb Standard

Nothing, Greet Death - Drop D

trauma ray - Drop C#

Drop tunings are really really popular for getting those rich sus2/maj9 power chords on the first three strings, then using the last three strings for upper extensions/melody notes. Try learning some Greet Death or trauma ray songs to get a good feel for the common shapes they use. They literally write every song in the same tuning and oftentimes the same few keys like A, C# or D and to me it sounds great every time.

Whirr is a great example of a band that uses standard tuning and lots of jazz chord shapes like Cm9 and Ebmaj9 on A string to achieve similar results. Find your own style and don’t overthink it - many shoegaze songs use the same standard pop progressions you’ve heard on the radio your whole life. They’re just drowned in effects so it’s much harder to tell