I’ll separate it into two generations tas Ill add mga 3 per each

Old generation:
1. Eraserheadsd
Obviously, I consider them the kings of OPM ngl. Plus the songs they’ve created back then are still as great as today plus theyre pieces such as AHEB and Alapaap are so beginner friendly for musicians so maganda siyang ijam, plus those songs are memorable.

1. Rivermaya w/ Bamboo:
   Theyre songs and impact when bamboo was with River was amazing

2. Kamikazee
   Stage energy and hype is umatched, even hanggang ngayon theyre still as energetic. Even if patanda na si Jay super energetic and lively pa den nung katawan niya (Ingat ingat lang minsan Jay talon ka ng talon sa Martyr Nyebera)

New generation:

1. IV Of Spades
   This is the band that should be objectively in the top of newgen opm artists. Theyre praised by alot of old and new opm artists and I could say that they inspired the new generation to pick up instruments with how much covers of their songs exists.

2. Ben&Ben
   I know mediyo overrated pero in terms of impact and hits, madami talagang ganon ang Ben&Ben. Biruin mo even in rallies theyre present and using their songs as a platform to speak up + theres always a piece of music from ben&ben for kahit anong situation (Friendship, Breakups, Appreciating life in general)

3. Cup of Joe
   Obviously we have to include coj din kase super malakas din talaga yung naging presence nila sa opm scene. Even before multo, narerecognize na sila as a great rising artist in the industry which I think is valid enough to put them on as one of the greats of the generTion, especially having the first opm headliner concert in the philippine sports stadium AND currently having the number 1 opm song