For describing a person's personality or skills:
* Mayaman sa kaalaman at karanasan (rich in knowledge and experience)
* May iba't ibang talento (has diverse talents)
* Marunong sa maraming bagay (knowledgeable in many things)
* May balanseng pagkatao (has a balanced personality)
For describing something complete or comprehensive:
* Kumpleto (complete)
* Masaklaw (comprehensive)
* Mahusay na binuo (well-developed)
For describing something balanced or symmetrical:
* Pantay-pantay (even)
* May tamang proporsyon (with the right proportions)
The best translation for "well-rounded" will depend on the specific context and nuance you want to convey.