You will occasionally hear it said that you cannot win an open league with a team build around home runs. This is not true. One example: this team just won an OL World Series:
C: 1938 Rudy York
1B: 1937 Dolph Camilli
2B: 1948 Joe Gordon
3B: 1986 Mike Schmidt
SS: 2007 Hanley Ramirez
LF: 1953 Ralph Kiner
CF: 1970 Paul Blair
RF: 1985 Mike Young
Everyone of those players hit 29+ HR in real life, except for Blair who was drafted mostly for his defense. Though Blair still had 18 HR.
The offense finished second in the league with 178 HR, won their division, and went 11-4 in the postseason.
There are many ways to win in open leagues. Even without Ketel Marte.