Be careful there. Very easy to get all caught up in this widget stuff and end up spending a small fortune. Don't let the way something looks overpower its function. Developers know people want this, just give them time to push out their updates.
Saying that, I like UpWord Notepad (it's free, but don't let the IAP scare you away). It's kinda like Mailbox for notes. And I like it because it's less limiting than Clear and Wunderlist. The widget is pretty cool too. You can actually click on it and organize your list right on the Today screen.
If you're going to splurge on something now, I'd recommend the Agenda, Forecast, and Paste widgets bundle by Avanio Labs. They're definitely worth the money.