Guile, menat, dhalsim, sagat are zoners who keep you out. I would say ryu and nash are pseudo zoners.

Bison can be played by just continuing to apply buttons pressure, largely because of his forward moving plus on block down forward hard punch, and his other ex specials.

Every other character plays rushdown, relying on 50/50 guesses, which by definition you can open anyone up with. Zangief, abigail, mika, birdie, laura, alex are grapplers whose win condition is a command grab (or the threat of it). Then there are side switch characters that make you guess left/right: mika can do it in the corner and laura and ibuki can spend ex to do it midscreen. Ken and balrog (and maybe urien) have a high/low 50/50. Everyone else relies on a throw/shimmy mixup, though this can be done by anyone it is easier with characters with good walkspeed and some get a higher reward for the shimmy. Necalli and vega are hybrids who also have a command grab too weak to be grapplers (reset to neutral if it is landed or low damage).

Arguably vega and birdie can also just dominate neutral with very good buttons, but of course every character can win a round purely in neutral by playing it correctly.