I'm 65, Baptist my entire life and have known many Baptist Pastors and have never met a Baptist Pastor who wanted to be addressed by the title "Reverend".
I've never met Sharpton or Jackson and don't even know if they claim to be Baptist.
News people refer to them as Reverend.
Just going from the general media. References to Billy Graham and his son Franklin Graham always say “Reverend Graham,” as if that’s what you’d say if you met either man in person.
Would real people (non-journalists) say Mr. Graham?
I’m Anglican so my knowledge of Baptist practices of addressing their clergy is limited. However we do count among our closest friends a Baptist pastor and his family. When visiting his church we have have heard him called Pastor by some and Brother by others. We have never heard him addressed as Reverend.