its close but id take healthy Porzingins over Towns (there are more between Embiid and Simmons, but didnt think it was necessary to make a longer list for my point). i put AD (Giannis too btw, legit MVP candidate already and tons of room to grow) there because he belongs in the same age group. but i think Embiid has more upside even if AD is currently better, provided he can stay healthy fo several seasons
one thing that makes me really happy is how many bigs there are among the top young players in the league, been a while since that was the case