This question has been answered fully, but it's useful for me to be able to see what every font looks like so that I'm sure of which one I would like to use. In the interest of saving someone else from reinventing the wheel, I'll post my code here. As above, each font family is shown in a scrolling window. The difference is that each font in this code is printed in the font itself.

from tkinter import *
from tkinter import font

root = Tk()
root.title('Font Families')
fonts=list(font.families())
fonts.sort()

def populate(frame):
    '''Put in the fonts'''
    listnumber = 1
    for i, item in enumerate(fonts):
        label = "listlabel" + str(listnumber)
        label = Label(frame,text=item,font=(item, 16))
        label.grid(row=i)
        label.bind("<Button-1>",lambda e,item=item:copy_to_clipboard(item))
        listnumber += 1

def copy_to_clipboard(item):
    root.clipboard_clear()
    root.clipboard_append("font=('" + item.lstrip('@') + "', 12)")

def onFrameConfigure(canvas):
    '''Reset the scroll region to encompass the inner frame'''
    canvas.configure(scrollregion=canvas.bbox("all"))

canvas = Canvas(root, borderwidth=0, background="#ffffff")
frame = Frame(canvas, background="#ffffff")
vsb = Scrollbar(root, orient="vertical", command=canvas.yview)
canvas.configure(yscrollcommand=vsb.set)

vsb.pack(side="right", fill="y")
canvas.pack(side="left", fill="both", expand=True)
canvas.create_window((4,4), window=frame, anchor="nw")

frame.bind("<Configure>", lambda event, canvas=canvas: onFrameConfigure(canvas))

populate(frame)

root.mainloop()

I hope this helps somebody.

Edit: Clicking on font name will copy it to clipboard ready for use in your tkinter script, per request from @idbrii .