You can use this site and just random generate seed till you find one you like:
https://valheim-map.world/?seed=wRLxWTQqT7&offset=-121%2C377&zoom=0.427&view=0&ver=0.212.7

VPm7tCXMDS for example has a lake near 1.st boss. (not to the sea tho)

C3aVK0jsag is probaly the closest thing.