Guru is an underrated Hip Hop Legend. He meant a lot to me as a rap fan as it felt like he was an older brother schooling me or kicking knowledge. What's crazy is how lyrical he was if your really look into his words. Sure he had the monotone flow but his voice was dope and again lyrically he was dope. Here's a great song by him and Preme from the "Training Day" soundtrack:
Feel you on that older brother shyt too, I just always respected him and felt he was always bringing positivity and knowledge, he rarely if ever said nothing, he had substance, he was important to music. Gangstarr and Jazzmataz and in general. Definitely underrated. Yeah he was lyrical and he REALLY said some meaningful deep shyt, a lot of the truest Hip Hop heads I know offline are huge on Gangstarr and we have been for years. We've always rated him very highly, was extremely saddened when he passed away. And regarding the voice I think that worked really well, really like his voice, that was his style.