Below a non Hindu's perception, no offence is meant to any Hindu.
Hard to choose; there are approximately 15 million gods in Hinduism , depending on your perspective. Hinduism also claims there is only one God, Shiva .There are seven gods which represent seven aspects of Shiva. They are:
1. Dreaming force - Indra, 2. Illusory force - Shakti, 3. Voluntary force - Brahma, 4. Semi voluntary force - Vishnu, 5. Involuntary force - Shiva, 6. Status altering force - Shani, 7 Compulsive force-Yama.
Hinduism is everything to all men; it can be simple, complex, or sublime, as in The Bhagavad Gita. Hinduism is theoretically the most inclusive religion ever invented. In practice, not so much, the caste system is alive and well in rural areas, and much evil is still done in the name of caste. Ingrained social norms cannot be ended by passing legislation.
I'm an atheist, but have a special affection for Ganesh, and have several small statues or him spread around my house. I like him because in Hindu mythology, it was Ganesh who wrote down the Mahabharata. I also see him as the patron of scholars.