It depends largely on the look you’re going for, a more faded less saturated look or very contrasty and saturated. A pretty “neutral” one I like is the Agfacolor Futura 100. Very contrasty ones are the Ektrachrome or the Kodachrome ones.
For some of these you may have to change the Tint a lot in order to get back your white balance.
What I tend to do also is not use a tonecurve in Maxwell at all and instead use the Adjustment layer called “Color lookup” and choosing a LUT there (these lookup tables are essentially like changing the tone curves in Maxwell). The Fuji and Kodak ones included with Photoshop are pretty good and give a more photographic look.
Before adding this Color lookup adjustment layer though, I also add a curves layer and try to bring the ends of the curve closer to where the histogram begins. With Maxwell giving you a pretty flat default look, you need to move the left side of the curve closer to the right.