Been doing well learning and playing Sakura but I sort of realized that the only characters I’ve been able to perform decently with were shotos (Ryu, Akuma, Sakura). I’ve been looking to learn a new character for Ultra. I don’t have any experience playing charge characters and don’t have too much interest in them, however I wouldn’t completely rule trying those characters out. I’m not a newbie in terms of mechanics and executions, but definitely not at the level I could learn any of the really technical characters.
try rufus 
Just pick who you like! Play at a beginner’s level and grind it out later if necessary. I’m planning on Poison.
If that’s not really an answer for you, then maybe you could try…
- Cammy
- Bison
- Guile
- Cody
- A grappler
- Balrog (Boxer)
- Yun
- Adon
Adon has been working well for me. IAJK is relatively high execution (to do it when you want to and at minimum height) but he’s relatively straightforward.
Since the others I’d suggest have been mentioned, I’m going to suggest Cody, even though he’s kind of tricky once your opponents get better. Still, he’s got tools for most situations, his combos are relatively straightforward, and he’s overall really fun to use.
Oh, and Yang.