According to a 1958 copy of Jazz Hot magazine (http://www.jazzhot.net/, still exists!) I have at home, the "sped up and lively blues structure with very marked rhythms" that is at the origin of Rock n Roll is attributed to Lionel Hampton, as a "trademark style" of the Big Band he created in 1940 to carry his musical ideas. You can search for recordings such as "Flying Home" on youtube to judge by yourself. This style got very popular in the following years, possibly because of its high "dance-ability" (note: this last sentence a personal interpretation).

Because of the racial divide at the time, Jazz music was mostly targeted at black audiences, in music collections called "race series".

Marketers at several record companies figured they could promote the then popular "rythm n blues" style of "black-labeled" music to a white audience by promoting white band leaders, such as Bill Haley and Elvis Presley. This happened around 1953.

So, for a large part, and notwithstanding the talent of the fathers of rock n roll, the birth of rock n roll results from a successful music marketing initiative.

PS: most of this I recall from memory, as I don't have the material at hand. Please apologize for possible mistakes, I'll try to edit the post later.

You're starting from a lot of incorrect assumptions.

1. Lots of rock does not have distorted electric guitar at all. For decades the use of guitar in rock preferred a very clean sound, and it was only by pushing tube amplifiers really hard you had any kind of primitive distortion. Fuzz pedals and such are actually relatively new
2. Early rock didn't use bass guitar at all, and often used upright bass, and a lot of the early electric basses were electric upright basses, and not guitars at all.
3. Drums forward sound is also relatively new as well. Early rock favoured cleaner, quieter drum sound. The sound you're likely thinking of came from Led Zeppelin's album "When the Levee Breaks" where they decided to record John Bonham playing in a staircase to get the loud resonance of the drum set. Prior to that they would mic each drum individually and get a cleaner sound.
4. Verse chorus format is centuries old, and there are examples in sacred music that date back forever.

Your definition will exclude most of early rock entirely.