And you mentioned that Qoran and Sunah are silent on selecting/electing a leader according to Ahle Sunah,  you've lost me here, what is Shura all about and where does it go then?
Shura was laid down in the Quran as a generic principle in conducting our affairs only. No details were given on what, who, when and how. We read in Ash-Shura, verse 38:
وَالَّذِينَ اسْتَجَابُوا لِرَبِّهِمْ وَأَقَامُوا الصَّلَاةَ وَأَمْرُهُمْ شُورَىٰ بَيْنَهُمْ وَمِمَّا رَزَقْنَاهُمْ يُنْفِقُونَ
(Sahih International)
And  those  who  have  responded  to  their  lord  and  established  prayer  and  whose  affair  is [determined  by]  consultation  among  themselves,  and  from  what  We  have  provided  them, they  spend.As you can see, the verse is generic and:
a) It covers the affairs of people in general and nothing specific about appointment of leaders. 
b) It does not indicate who should be consulted and what they should be consulted about i.e. no explanation about shura methodology is given.
This is the closes you can get about selecting a leader via shura in the Quran. From a generic verse. Even so, you can clearly see that the verse indicates that shura is only praiseworthy and not mandatory. 
Therefore, nothing wrong at all if heavyweight of Ahlus Sunnah said that even the appointment of a leader by force, it is still considered legitimate as as long as their rule not against Quran and Sunnah because of shura is praiseworthy and recommended and not mandatory.
There are 2 more verses where shura is mentioned. But none of them with regard to selecting a leader:
Sura Ali-Imran, Ayah 159:
فَبِمَا رَحْمَةٍ مِنَ اللَّهِ لِنْتَ لَهُمْ ۖ وَلَوْ كُنْتَ فَظًّا غَلِيظَ الْقَلْبِ لَانْفَضُّوا مِنْ حَوْلِكَ ۖ فَاعْفُ عَنْهُمْ وَاسْتَغْفِرْ لَهُمْ وَشَاوِرْهُمْ فِي الْأَمْرِ ۖ فَإِذَا عَزَمْتَ فَتَوَكَّلْ عَلَى اللَّهِ ۚ إِنَّ اللَّهَ يُحِبُّ الْمُتَوَكِّلِينَ
(Sahih International)
So  by  mercy  from Allah ,  [O  Muhammad],  you  were  lenient  with  them.  And  if  you  had been  rude  [in  speech]  and  harsh  in  heart,  they  would  have  disbanded  from  about  you. So  pardon  them  and  ask  forgiveness  for  them  and  consult  them  in  the  matter.  And when  you  have  decided,  then  rely  upon Allah .  Indeed, Allah loves  those  who  rely  [upon Him].The verse is about the appointed leader himself i.e. Rasulullah (saw) consulting others. Not specifically about selection of leaders. And as you can see, no explanation about its methodology like the previous verse.
Sura Al-Baqarah, Ayah 233:
وَالْوَالِدَاتُ يُرْضِعْنَ أَوْلَادَهُنَّ حَوْلَيْنِ كَامِلَيْنِ ۖ لِمَنْ أَرَادَ أَنْ يُتِمَّ الرَّضَاعَةَ ۚ وَعَلَى الْمَوْلُودِ لَهُ رِزْقُهُنَّ وَكِسْوَتُهُنَّ بِالْمَعْرُوفِ ۚ لَا تُكَلَّفُ نَفْسٌ إِلَّا وُسْعَهَا ۚ لَا تُضَارَّ وَالِدَةٌ بِوَلَدِهَا وَلَا مَوْلُودٌ لَهُ بِوَلَدِهِ ۚ وَعَلَى الْوَارِثِ مِثْلُ ذَٰلِكَ ۗ فَإِنْ أَرَادَا فِصَالًا عَنْ تَرَاضٍ مِنْهُمَا وَتَشَاوُرٍ فَلَا جُنَاحَ عَلَيْهِمَا ۗ وَإِنْ أَرَدْتُمْ أَنْ تَسْتَرْضِعُوا أَوْلَادَكُمْ فَلَا جُنَاحَ عَلَيْكُمْ إِذَا سَلَّمْتُمْ مَا آتَيْتُمْ بِالْمَعْرُوفِ ۗ وَاتَّقُوا اللَّهَ وَاعْلَمُوا أَنَّ اللَّهَ بِمَا تَعْمَلُونَ بَصِيرٌ
(Sahih International)
Mothers may breastfeed their children two complete years for whoever wishes to complete the nursing [period]. Upon the father is the mothers' provision and their clothing according to what is acceptable. No person is charged with more than his capacity. No mother should be harmed through her child, and no father through his child. And upon the [father's] heir is [a duty] like that [of the father]. And if they both desire weaning through mutual consent from both of them and consultation, there is no blame upon either of them. And if you wish to have your children nursed by a substitute, there is no blame upon you as long as you give payment according to what is acceptable. And fear Allah and know that Allah is Seeing of what you do.The verse is with regard to family matter and not about selection of leaders.
As for Sunnah, shura was mainly used by Rasulullah (saw) in the context of verse 159 of Sura Ali-Imran above. With regard to selecting leader after his (saw) death via shura, silent.