Sounds like a highly underrated boom or bust prospect
My thoughts exactly. Really like his skills in close and ability to get shots through blocks, release is pretty nice also. Skating and hockey sense are above-average too, but he doesn't have ++skill, isn't even close to an elite thinker of the game nor a very energetic player in all three zones. If everything clicks with him you've got borderline first-line upside, but if it doesn't you have a taller, stronger, slower Hunter Shinkaruk, AKA a complete bust.
I wouldn't draft him in the second, it's too risky, but in the third he's a real solid pick that could pay great dividends to the team that drafts him ala Victor Olofsson.
Anyways, Jarventie is definitely another one of those you keep tabs on in the coming years, and an interesting gamble for those teams with depth that can afford to ''waste'' a draft pick in the likely scenario that he doesn't make it.