I've checked some out a couple of years ago. You know that Joko Widodo, Indonesia's president is a fan of metal music. He owns a guitar from Metallica and went to several metal concerts. He also used to play metal.
What stood out for me at that time was Voice of Baceprot. What's also interesting is that these three muslim women are playing metal and there are no qualms about religion, as the crowds are mixed, muslim and non muslim, in a country with 87% percent of muslims. And yes, there are some terrorist attacks although they are in the province of Aceh, which is rather more towards islam with sharia and all that. Aceh's population is 4.7 million out of a total Indonesian population of 237 million.
Here is VOB live, 45 minute clip:
https://www.youtube.com/watch?v=_qMsOmQP8Ao
Another good clip of VOB is this studio session, about 15 minutes:
https://www.youtube.com/watch?v=tBbPpmQyRcg
Meliani is quite a good (metal) guitar player. The thing with this is that Indonesians can also created from a pool of traditional age-old harmonies and scales.
https://www.youtube.com/watch?v=CW6r3L1FHtc
And yet another one, on acoustic guitar:
https://www.youtube.com/watch?v=11bJoNJD7xI
It's interesting to see all those people playing guitar when their president is a metal fan. Like if Merkel was a fan of spätzle and then a lot of Germans would eat spätzle. Wait ....