How to build (high quality) emoji in matplotlib?

Question

I have the following dictionary:

a = {'❤': 10, '👨‍👩‍👦‍👦': 23, '👹': 13, '🙅🏽': 10, '😡': 13}

I want to draw emojis like a bar and draw them on a bar. At first I liked it here (s annotate), but it looks bad and it does not support some emojis.

import matplotlib.pyplot as plt
ax = plt.subplot(111)
ax.bar(range(1,6), a.values())
for label, x, y in zip(a.keys(), range(1,6), a.values()):
    plt.annotate(
        label, 
        xy=(x, y), xytext=(10,10),
        textcoords='offset points', ha='right', va='bottom',
        bbox=dict(boxstyle='round,pad=0.5', alpha=0),
        fontname='Segoe UI Emoji',
        fontsize=20)

ax.spines['right'].set_visible(False)
ax.spines['top'].set_visible(False)
ax.set_xticks([])
plt.show()

As I said, it looks bad:

How can I sketch emojis so that they look good with matplotlib?

A better option would be to use a different font in matplotlib that will support these emojis (I tried using several different values ​​for plt.rcParams['font.family']no success), but if it does not exist, the images will work too (but how?)

I do not want to start web-cleaning images and marking them (because I'm sure someone has already done this).

python 3, ID Spyder, matplotlib 2.0.2 anaconda.

?