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tirmidhi:3641 – Qutaybah > Ibn Lahīʿah > ʿUbaydullāh b. al-Mughīrah > ʿAbdullāh b. al-Ḥārith b. Jazʾ

"I have not seen anyone who smiled more than the Messenger of Allah ﷺ."  

Abū ʿĪsá said that this Ḥadīth is Ḥasan-Gharīb.
الترمذي:٣٦٤١ – حَدَّثَنَا قُتَيْبَةُ حَدَّثَنَا ابْنُ لَهِيعَةَ عَنْ عُبَيْدِ اللَّهِ بْنِ الْمُغِيرَةِ عَنْ عَبْدِ اللَّهِ بْنِ الْحَارِثِ بْنِ جَزْءٍ قَالَ

مَا رَأَيْتُ أَحَدًا أَكْثَرَ تَبَسُّمًا مِنْ رَسُولِ اللَّهِ ﷺ  

قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ غَرِيبٌ

See similar narrations below:

Collected by Aḥmad, Dārimī
ahmad:17713 – Mūsá > Ibn Lahīʿah > ʿUbaydullāh b. al-Mughīrah > ʿAbdullāh b. al-Ḥārith b. Jazʾ al-Zubaydī

"I have not seen anyone who smiled more than the Messenger of Allah ﷺ." (Using translation from Tirmidhī 3641)  

أحمد:١٧٧١٣ – حَدَّثَنَا مُوسَى حَدَّثَنَا ابْنُ لَهِيعَةَ عَنْ عُبَيْدِ اللهِ بْنِ الْمُغِيرَةِ قَالَ سَمِعْتُ عَبْدَ اللهِ بْنَ الْحَارِثِ بْنِ جَزْءٍ الزُّبَيْدِيَّ قَالَ

مَا رَأَيْتُ أَحَدًا أَكْثَرَ تَبَسُّمًا مِنْ رَسُولِ اللهِ ﷺ  

darimi:427 – al-Ḥakam b. al-Mubārak > Baqiyyah > Um ʿAbdullāh b. Khālid

[Machine] "I have never seen anyone more honorable for knowledge than my father."  

الدارمي:٤٢٧ – أَخْبَرَنَا الْحَكَمُ بْنُ الْمُبَارَكِ أَنبَأَنَا بَقِيَّةُ عَنْ أُمِّ عَبْدِ اللَّهِ بِنْتِ خَالِدٍ قَالَتْ

«مَا رَأَيْتُ أَحَدًا أَكْرَمَ لِلْعِلْمِ مِنْ أَبِي»