In that era, only Wilt Chamberlain could match his height (the reason the two were so completely dominant).
There were more good big men then than now. If you don't believe me Ask Pat Riley, Pat williams (sixer, magic exec), Heinson Bob Lanier etc.
"I like Shaq, but he's not in a league with guys like Wilt and (Bill) Russell," said Tom Heinsohn, the old Celtics forward and ex-head coach. "Shaq is this game's ultimate guy. But he's not a dominating guy at both ends of the floor. He doesn't sweep all the boards. Heck, those guys used to break up an entire defense by themselves. Look at the record book. Wilt averaged 50 points a game. Shaq, he's not playing against anybody his own size. So he's just knocking people over. Not only aren't there any centers anymore, there aren't that many power forwards,
"At one time, there were 10 great centers in the league, seven feet or better," said Miami's Pat Riley, who played with Chamberlain and later coached another Hall of Famer, Kareem Abdul-Jabbar. "Shaq is the only guy right now who is absolutely dominant, based on sheer force and talent."
Not 7' or better, though they might have looked it to Reilly, LOL!. It was the era of the great center, though. Great article here.
http://espn.go.com/nba/columns/lawrence/836066.html
6 ft 11 235 Nate thurmond
Honors: Elected to Naismith Memorial Basketball Hall of Fame (1985); NBA All-Defensive First Team (1969, '71); NBA All-Defensive Second Team (1972, '73, '74); NBA All-Rookie Team (1964); Seven-time NBA All-Star (1965-'68, '70, '73, '74); One of the 50 Greatest Players in NBA History (1996).
Nate Thurmond was one of the all-time great NBA centers, with a rugged, in-your-face style of play that frequently intimidated even Kareem Abdul-Jabbar and Wilt Chamberlain. The Hall of Famer played 14 professional seasons in the 1960s and 1970s, posting career averages of 15.0 points and 15.0 rebounds per game.
6 ft 9 in 225 lb Russell
7'1" 275 Wilt Chamberlain
6-11 245 lbs.Walt Bellamy
He averaged 20.1 points and 13.7 rebounds over a career that lasted 13 seasons and one game of a 14th. He is one of only seven players to score more than 20,000 points and grab more than 14,000 rebounds, a group that includes Wilt Chamberlain, Kareem Abdul-Jabbar, Elvin Hayes, Robert Parish, Moses Malone and Karl Malone. He played in four All-Star Games and he was the NBA's Rookie of the Year in 1962.
6' 10'': 235 Sam Lacey
A 6'10" center from New Mexico State University, Lacey played 13 seasons (1970–1983) in the National Basketball Association as a member of the Cincinnati Royals, Kansas City Kings, New Jersey Nets, and Cleveland Cavaliers. Lacey averaged over 10 rebounds per game in his first six seasons, and was the third leading rebounder in the 1974-75 season. In 1975, he played in the NBA All-Star Game.
He is one of five players (along with Hakeem Olajuwon, Julius Erving, David Robinson, and Ben Wallace) to have registered 100 blocks and 100 steals in six consecutive seasons [1], and he has had his #44 jersey retired by the Sacramento Kings franchise.