McHale would own. He is argubly the best low post scorer of all time. Isn't he the only guy to ever shoot 60% from the field and 80% from the line. Fakes still work today and his footwork is excellent. It would be easier for him today with the no charge line and less hand checks and pushing. The 80's were pretty physical down low.
As for athletic power fowards they had plenty in his era. Tom Chambers and Larry Nance both could jump higher than 90% of the guys today. McHale did just fine against them. Do you think Worthy was unathletic? I sure as heck don't. Kevin could guard SF-C. He matched up with Malone, Erving, Worthy, Wilkins, Nance, Chambers, Jabbar, Malone, Hakeem and plenty of athletic guys.