Scott Adams, creator of the Dilbert Comic Strip, has never publicly discussed his sexual orientation. He is married to Shelly Miles, and they have two children.
Straight. Dated Lady Diana c.1996, according to his ex girlfriend Cecilie Thomsen.
The character of Flapjack is not written with sexual orientation
Nothing is known of her sexual orientation.
The Joker's sexual orientation is not written into his character.
Soko's sexual orientation is heterosexual/straight.
There isn't publicly available information confirming the sexual orientation of James S. Adams. Personal details about individuals, including their sexual orientation, are often private unless they choose to share that information themselves. It's important to respect people's privacy and focus on their professional work rather than personal lives.
I think you mistake "sexual orientation" with specific types of orientation. Sexual orientation is a part of every humans make up. A person can not have a sexual orientation. Your sexual orientation is what makes you gay, straight or bisexual. Homosexuality IS illegal in some countries. You can outlaw a behavior but you can't outlaw an urge or feeling.
Reginald VelJohnson has not publicly spoken about his sexual orientation.
The fictional character of Yoshi is not depicted with sexual orientation.
The sexual orientation of David Rodriguez is unknown.
Matt Evers' sexual orientation is not known.