I play in C# a lot and I use my Monomyth JMP and I'm currently waiting on a MOAB ground zero Super lead. It definitely depends on what style of tone you are wanting. I like that grind that Marshall has and the modded stuff gives me that umph that I love from Bogner/Soldano. I have owned a Soldano Nitro and they do sound good, They are a bit stiff to my ear but to you might be what you are looking for.
in my experience my favourite for drop C-B we’re my Ground Zero Hellion, and my old Friedman Butterslax.
I don’t have them side by side but I think the Hellion would be the better of the two. The aura and the tight switch in the back let you fine tune the tightness.
My Hermansson is my other favourite but I find I like it more for even lower tunings with 7 and 8 string guitars.
I play C# with a Rivera M Series and love it. Knucklehead does the job too. What’s neat about Riveras is how tube dependent the tone is, they respond well to upgrades.